Kamica nerkowa
Etiologia i przyczyny

Kamica nerkowa (nefrolitiaza) to schorzenie o wieloczynnikowej etiologii, charakteryzujące się tworzeniem złogów mineralnych w układzie moczowym, najczęściej w nerkach. Występuje u około 10% populacji, z wyższą częstością u mężczyzn (1:10) niż u kobiet (1:35), ze szczytem zachorowań w wieku 30-60 lat. Patogeneza opiera się na przesyceniu moczu substancjami krystalicznymi (wapń, szczawiany, fosforany, kwas moczowy) oraz niedoborze inhibitorów krystalizacji (np. cytrynianu) i niskiej objętości moczu. Główne typy kamieni to: wapniowe (75-85%, w tym szczawianowo-wapniowe ~60% i fosforanowo-wapniowe), moczanowe (8-10%, związane z pH moczu <5,5), struwitowe (7-8%, powiązane z zakażeniami bakteryjnymi ureazododatnimi) oraz cystynowe (1-2%, w przebiegu cystynurii). Czynniki ryzyka obejmują predyspozycje genetyczne (dziedziczność kamicy ~45%), niewystarczające nawodnienie, dietę bogatą w sód, białko zwierzęce i szczawiany, otyłość, zespół metaboliczny, choroby współistniejące (np. nadczynność przytarczyc, dna moczanowa), a także stosowanie niektórych leków i suplementów (np. atazanawir, topiramat, witamina C w dużych dawkach).

Etiologia Kamicy Nerkowej (Kamica nerkowa – przyczyny)

Kamica nerkowa (nefrolitiaza) to schorzenie charakteryzujące się tworzeniem twardych złogów z minerałów i soli w układzie moczowym, najczęściej w nerkach. Jest to powszechny problem zdrowotny, dotykający około 10% populacji. W Stanach Zjednoczonych częstość występowania kamicy nerkowej wzrosła z 3,8% w późnych latach 70. do 8,8% w późnych latach 2000. Szacuje się, że ryzyko rozwoju kamicy nerkowej w ciągu życia wynosi 1 na 10 osób dla mężczyzn i 1 na 35 dla kobiet, a szczyt zachorowań przypada na wiek 30-60 lat 1234.

Powstawanie kamieni nerkowych nie ma jednej określonej przyczyny, ale wynika z wielu nakładających się czynników genetycznych, środowiskowych i metabolicznych. Kluczowym procesem w ich rozwoju jest przesycenie moczu substancjami takimi jak wapń, szczawiany, fosforany czy kwas moczowy, przy jednoczesnym niedoborze płynów lub substancji hamujących krystalizację 567.

Podstawowe mechanizmy tworzenia kamieni nerkowych

Kamienie nerkowe powstają, gdy w moczu dochodzi do krystalizacji różnych substancji. Dzieje się to, gdy stężenie substancji tworzących kamienie jest wysokie, a objętość moczu zbyt mała, aby je odpowiednio rozcieńczyć. Dodatkowo, przy niedoborze naturalnych inhibitorów krystalizacji (jak cytrynian), stwarza to idealne warunki do formowania się kamieni 89.

Proces ten obejmuje kilka etapów:

  • Przesycenie moczu substancjami krystalicznymi
  • Formowanie się zarodków kryształów
  • Wzrost kryształów
  • Agregacja kryształów w większe struktury
  • Przyleganie do nabłonka dróg moczowych

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Typy kamieni nerkowych i ich przyczyny

W zależności od składu chemicznego wyróżnia się kilka głównych typów kamieni nerkowych, które mają różne przyczyny powstawania:

Kamienie wapniowe

Kamienie wapniowe stanowią 75-85% wszystkich przypadków kamicy nerkowej. Dzielą się na dwa główne podtypy:

  • Kamienie szczawianowo-wapniowe – najczęstszy typ, stanowiący około 60% wszystkich kamieni. Powstają, gdy mocz zawiera wysokie stężenie wapnia i szczawianów. Mogą tworzyć się zarówno przy wysokim, jak i normalnym poziomie tych substancji w moczu 1213.
  • Kamienie fosforanowo-wapniowe – powstają często przy nieprawidłowym funkcjonowaniu dróg moczowych oraz przy współwystępowaniu kamieni szczawianowo-wapniowych. Częstą przyczyną ich tworzenia jest nadczynność przytarczyc, kwasica cewkowa nerkowa lub infekcje dróg moczowych 1415.
Kamienie moczanowe

Kamienie moczanowe stanowią około 8-10% wszystkich przypadków kamicy nerkowej. Są związane z niskim pH moczu (poniżej 5,5), dietą bogatą w puryny (ryby, rośliny strączkowe, mięso, ekstrakty mięsne, sosy) lub nowotworami z szybkim obrotem komórkowym. Często występują u osób z dną moczanową, ale większość pacjentów z tym typem kamieni nie ma podwyższonego poziomu kwasu moczowego – problemem jest zbyt kwaśny mocz 161718.

Kamienie struwitowe

Kamienie struwitowe (fosforanu amonowo-magnezowego) stanowią 7-8% przypadków kamicy nerkowej. Są prawie zawsze powodowane przez zakażenia układu moczowego bakteriami wytwarzającymi ureazę, które rozkładają mocznik do amoniaku. Te kamienie rosną szybko i mogą osiągać duże rozmiary, często z niewielkimi objawami. Są częstsze u kobiet 192021.

Kamienie cystynowe

Kamienie cystynowe stanowią około 1-2% wszystkich kamieni nerkowych i są powodowane przez rzadką, dziedziczną chorobę metaboliczną – cystynurię. W tym zaburzeniu dochodzi do niewydolności cewek nerkowych w reabsorpcji cystyny, lizyny, ornityny i argininy, co prowadzi do wysokiego stężenia cystyny w moczu i formowania się kamieni 222324.

Czynniki ryzyka kamicy nerkowej

Czynniki niemodyfikowalne

Istnieją czynniki, na które nie mamy wpływu, a które mogą zwiększać ryzyko rozwoju kamicy nerkowej:

Predyspozycje genetyczne i rodzinne

Genetyka odgrywa znaczącą rolę w rozwoju kamicy nerkowej. Badania bliźniąt szacują dziedziczność kamicy nerkowej na około 45%, a hiperkalciurii na 50%. Pozytywny wywiad rodzinny zwiększa ryzyko tworzenia nowych kamieni 2,5-krotnie. Niektóre rzadkie choroby genetyczne bezpośrednio prowadzą do tworzenia kamieni, takie jak 2526:

  • Cystynuria – prowadząca do kamieni cystynowych
  • Pierwotna hiperoksaluria – powodująca nadmierne wytwarzanie szczawianów przez wątrobę
  • Kwasica cewkowa nerkowa – powodująca zaburzenia równowagi kwasowo-zasadowej
  • Zespół Barttera – zaburzenie czynności cewek nerkowych
  • Choroba Denta – rzadka choroba genetyczna nerek

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Wiek, płeć i rasa

Kamica nerkowa częściej występuje u:

  • Mężczyzn (prawie dwukrotnie częściej niż u kobiet)
  • Osób w wieku 30-60 lat
  • Osób rasy kaukaskiej (w porównaniu do rasy czarnej)

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Przebyta kamica nerkowa

Osoby, które miały kamienie nerkowe w przeszłości, mają zwiększone ryzyko nawrotu. Wcześniejsza historia kamicy nerkowej zwiększa ryzyko nowych kamieni o 15% w pierwszym roku i średnio o 50% w ciągu następnych 10 lat. U pacjentów, którzy rozwinęli jeden kamień, istnieje około 50% ryzyko rozwoju kolejnego w ciągu 5-7 lat 323334.

Czynniki modyfikowalne

Nawodnienie i objętość moczu

Niewystarczające nawodnienie jest prawdopodobnie najważniejszym czynnikiem środowiskowym w tworzeniu kamieni nerkowych. Niska objętość moczu prowadzi do wysokiego stężenia substancji tworzących kamienie 3536.

Przy zmniejszonej objętości moczu, mocz staje się bardziej skoncentrowany i ciemniejszy. Niedostateczne nawodnienie może wynikać z:

  • Niewystarczającego spożycia płynów
  • Zwiększonej utraty płynów (np. podczas intensywnego wysiłku fizycznego, w gorącym klimacie)
  • Chorób powodujących przewlekłą biegunkę

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Czynniki dietetyczne

Dieta odgrywa istotną rolę w rozwoju kamicy nerkowej. Czynniki dietetyczne zwiększające ryzyko to:

  • Wysokie spożycie sodu – zwiększa wydalanie wapnia z moczem, co podnosi ryzyko kamieni wapniowych 3940
  • Dieta bogata w białko zwierzęce – mięso, drób, ryby zwiększają poziom kwasu moczowego i wapnia w moczu 4142
  • Wysokie spożycie szczawianów – znajdujących się w szpinaku, burakach, orzechach, czekoladzie i herbacie 43
  • Wysokie spożycie cukru – szczególnie fruktozy i sacharozy 4445

Wbrew powszechnemu przekonaniu, ograniczanie spożycia wapnia w diecie może faktycznie zwiększać ryzyko kamieni szczawianowo-wapniowych, ponieważ wapń wiąże się ze szczawianami w jelitach, zmniejszając ich wchłanianie. Niskie spożycie wapnia prowadzi do zwiększonego wchłaniania szczawianów i wyższego ich stężenia w moczu 4647.

Otyłość i zespół metaboliczny

Otyłość, wysoki wskaźnik masy ciała (BMI), duży obwód talii i przyrost masy ciała zostały powiązane ze zwiększonym ryzykiem kamicy nerkowej. Nadwaga może zmieniać skład moczu, zwiększając poziom kwasu i zmniejszając pH moczu 4849.

Zespół metaboliczny, charakteryzujący się wysokim ciśnieniem krwi, otyłością i insulinoopornością, został również powiązany z kamicą nerkową 50.

Leki i suplementy

Niektóre leki i suplementy mogą zwiększać ryzyko tworzenia kamieni nerkowych:

  • Leki związane z kamicą nerkową:
    • Atazanawir (lek przeciwko HIV)
    • Guajfenezyna (lek wykrztuśny)
    • Indynawir (inhibitor proteazy stosowany w leczeniu HIV)
    • Nadużywanie krzemianów
    • Sulfonamidy (antybiotyki)
    • Triamteren (diuretyk)
    • Topiramat (lek przeciwpadaczkowy)
    • Diuretyki tiazydowe (leki moczopędne)
    • Antacydy na bazie wapnia
  • Suplementy:
    • Suplementy wapnia (szczególnie u mężczyzn)
    • Witamina C w dużych dawkach (może zwiększać poziom szczawianów)
    • Witamina D

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Schorzenia związane z kamicą nerkową

Choroby endokrynologiczne

  • Nadczynność przytarczyc (pierwotna) – powoduje zwiększone stężenie wapnia we krwi i moczu, co sprzyja tworzeniu kamieni wapniowych 5556
  • Cukrzyca typu 2 – może powodować zwiększoną kwasowość moczu, co sprzyja tworzeniu się kamieni moczanowych 5758

Choroby metaboliczne

  • Dna moczanowa – powoduje gromadzenie się kwasu moczowego we krwi i tworzenie kryształów w stawach i nerkach 5960
  • Hiperkalciuria – genetyczny stan powodujący zwiększone wydalanie wapnia z moczem 6162
  • Hiperoksaluria – stan charakteryzujący się wysokim poziomem szczawianów w moczu 63
  • Hipocytraturia – niski poziom cytrynianu w moczu, który normalnie hamuje tworzenie się kamieni 6465
  • Hiperurikozuria – zwiększone wydalanie kwasu moczowego z moczem 6667

Choroby układu pokarmowego

Choroby układu moczowego

  • Nawracające zakażenia układu moczowego – szczególnie te wywołane przez bakterie wytwarzające ureazę, mogą prowadzić do tworzenia kamieni struwitowych 7273
  • Wady anatomiczne układu moczowego – takie jak przeszkoda w odpływie moczu, uchyłek kielicha nerkowego, zwężenie moczowodu, mogą powodować zastój moczu i sprzyjać tworzeniu kamieni 74
  • Gąbczastość rdzenia nerki – wrodzona anomalia nerek charakteryzująca się poszerzeniem cewek zbiorczych 75

Inne choroby i stany

  • Sarkoidoza – może powodować hiperkalcemię i hiperkalciurię 76
  • Nadciśnienie tętnicze – powiązane z wyższym ryzykiem kamicy nerkowej 77
  • Mukowiscydoza – powiązana ze zwiększonym poziomem szczawianów 78
  • Stres – wysoki poziom stresu może wywoływać zmiany chemiczne w organizmie, zwiększając stężenie substancji takich jak wapń, szczawiany i kwas moczowy w moczu, jednocześnie zmniejszając objętość moczu 79

Zmiany fizykochemiczne w moczu prowadzące do kamicy

Kamienie nerkowe tworzą się w wyniku zaburzeń równowagi między substancjami rozpuszczonymi w moczu a objętością płynu. Kluczowe zmiany fizykochemiczne w moczu to:

Przesycenie moczu substancjami litogennymi

Przesycenie moczu substancjami krystalicznymi jest podstawowym wymogiem do tworzenia kamieni. Najważniejsze zmiany to:

  • Hiperkalciuria – najczęstsza nieprawidłowość metaboliczna, odpowiedzialna za nawet 70% kamieni wapniowych. Może być spowodowana zwiększonym wchłanianiem jelitowym wapnia, nadmierną resorpcją wapnia z kości (np. w nadczynności przytarczyc) lub niewydolnością cewek nerkowych w prawidłowym wchłanianiu zwrotnym wapnia z przesączu kłębuszkowego 8081
  • Hiperoksaluria – zwiększone wydalanie szczawianów z moczem, odpowiedzialne za do 60% kamieni wapniowych. Może być pierwotna (genetyczna) lub wtórna (nabyta, np. w wyniku zwiększonego spożycia szczawianów lub zaburzeń wchłaniania jelitowego) 8283
  • Hiperurikozuria – zwiększone wydalanie kwasu moczowego, występuje u 15-20% osób z kamieniami szczawianowo-wapniowymi 8485

Niedobór naturalnych inhibitorów krystalizacji

W moczu znajdują się naturalne substancje zapobiegające krystalizacji i tworzeniu kamieni. Ich niedobór zwiększa ryzyko kamicy:

  • Hipocytraturia – niedobór cytrynianu, który jest ważnym inhibitorem krystalizacji w moczu. Cytrynian wiąże wapń, tworząc rozpuszczalne kompleksy i zapobiega tworzeniu się kamieni 8687
  • Niedobór magnezu – magnez jest ważnym inhibitorem tworzenia kamieni w drogach moczowych 88

Zaburzenia pH moczu

pH moczu ma istotny wpływ na rozpuszczalność różnych substancji:

  • Kwaśne pH (poniżej 5,5) – sprzyja tworzeniu kamieni moczanowych i cystynowych 8990
  • Zasadowe pH – sprzyja krystalizacji fosforanów wapnia i tworzeniu kamieni struwitowych 91

Niska objętość moczu

Zmniejszona objętość moczu prowadzi do zwiększonego stężenia wszystkich substancji rozpuszczonych, co sprzyja ich krystalizacji. Jest to jeden z najważniejszych, a jednocześnie najbardziej modyfikowalnych czynników ryzyka kamicy nerkowej 9293.

Kamienie idiopatyczne

Warto zaznaczyć, że często przyczyna kamicy nerkowej pozostaje nieznana i określana jest jako idiopatyczna nefrolitiaza. Oznacza to, że mimo dokładnych badań nie udaje się zidentyfikować jednej konkretnej przyczyny tworzenia kamieni. W takich przypadkach prawdopodobnie dochodzi do interakcji między różnymi czynnikami genetycznymi, środowiskowymi i metabolicznymi 9495.

Podsumowanie najważniejszych czynników

Kamica nerkowa jest wieloczynnikowym schorzeniem, a jej etiologia obejmuje zarówno czynniki genetyczne, jak i środowiskowe. Do najważniejszych należą:

  1. Niewystarczające nawodnienie i mała objętość moczu
  2. Predyspozycje genetyczne i rodzinne
  3. Zaburzenia metaboliczne (hiperkalciuria, hiperoksaluria, hiperurikozuria, hipocytraturia)
  4. Dieta bogata w sód, białko zwierzęce i cukry proste
  5. Otyłość i zespół metaboliczny
  6. Choroby współistniejące (nadczynność przytarczyc, dna moczanowa, nieswoiste zapalenia jelit)
  7. Nawracające infekcje układu moczowego
  8. Przyjmowanie niektórych leków i suplementów
  9. Zaburzenia anatomiczne układu moczowego

Zrozumienie złożonej etiologii kamicy nerkowej jest kluczowe dla skutecznej profilaktyki i leczenia tego schorzenia. W wielu przypadkach możliwe jest zidentyfikowanie i modyfikacja czynników ryzyka, co może znacząco zmniejszyć ryzyko nawrotów 9697.

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  1. 11.04.2026
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Materiały źródłowe

  • #1 Kidney stones – Symptoms and causes – Mayo Clinic
    https://www.mayoclinic.org/diseases-conditions/kidney-stones/symptoms-causes/syc-20355755
    Kidney stones are hard objects made of minerals and salts in urine. They form inside the kidneys. […] Kidney stones have various causes. These include diet, extra body weight, some health conditions, and some supplements and medicines. Kidney stones can affect any of the organs that make urine or remove it from the body from the kidneys to the bladder. Often, stones form when the urine has less water in it. This lets minerals form crystals and stick together. […] Kidney stones develop when the urine contains more crystal-forming substances than the fluid in the urine can dilute. These substances include calcium oxalate, calcium phosphate and uric acid. At the same time, the urine may lack substances that prevent crystals from sticking together. That creates an ideal setting for kidney stones to form.
  • #2 Kidney stones – Symptoms, causes, types, and treatment | National Kidney Foundation
    https://www.kidney.org/kidney-topics/kidney-stones
    A kidney stone is a hard object that is made from chemicals in the urine. […] The prevalence of kidney stones in the United States increased from 3.8% in the late 1970s to 8.8% in the late 2000s. Other diseases such as high blood pressure, diabetes, and obesity may increase the risk for kidney stones. […] Possible causes include drinking too little water, exercise (too much or too little), obesity, weight loss surgery, or eating food with too much salt or sugar. Infections and family history might be important in some people. Eating too much fructose correlates with increasing risk of developing a kidney stone. […] The most common type of stone contains calcium. Calcium is a normal part of a healthy diet. The kidney usually removes extra calcium that the body doesn’t need. Often people with stones keep too much calcium. This calcium combines with waste products like oxalate to form a stone. The most common combination is called calcium oxalate.
  • #3 Kidney stones | Better Health Channel
    https://www.betterhealth.vic.gov.au/health/conditionsandtreatments/kidney-stones
    The lifetime risk of developing kidney stones is one in 10 for men and one in 35 for women. […] A kidney stone can form when substances such as calcium, oxalate, cystine or uric acid are at high levels in the urine, although stones can form even if these chemicals are at normal levels. […] Medications used for treating some medical conditions such as kidney disease, cancer or HIV can also increase your risk of developing kidney stones. […] A small number of people get kidney stones because of certain medical conditions that lead to high levels of calcium, oxalate, cystine or uric acid in the body.
  • #4
    https://www.nhs.uk/conditions/kidney-stones/
    Kidney stones can develop in 1 or both kidneys and most often affect people aged 30 to 60. […] What causes kidney stones? […] Waste products in the blood can occasionally form crystals that collect inside the kidneys. […] Over time, the crystals may build up to form a hard stone-like lump. […] This is more likely to happen if you: do not drink enough fluids, are taking some types of medication, have a medical condition that raises the levels of certain substances in your urine. […] Find out more about the causes of kidney stones.
  • #5 Renal Calculi, Nephrolithiasis – StatPearls – NCBI Bookshelf
    https://www.ncbi.nlm.nih.gov/books/NBK442014/
    Renal calculi are a common cause of blood in the urine (hematuria) and pain in the abdomen, flank, or groin. Development of the stones is related to decreased urine volume or increased excretion of stone-forming components such as calcium, oxalate, uric acid, cystine, xanthine, and phosphate. […] Calculi may also be caused by low urinary citrate levels or excessive urinary acidity. […] Urolithiasis occurs when solutes crystallize out of urine to form stones. Urolithiasis may occur due to anatomic features leading to urinary stasis, low urine volume, dietary factors (eg, high oxalate or high sodium), urinary tract infections, systemic acidosis, medications, or, rarely, inheritable genetic factors such as cystinuria. […] Most patients with nephrolithiasis (75%-85%) form calcium stones, most composed primarily of calcium oxalate (monohydrate or dihydrate) or calcium phosphate. The other main types include uric acid (8%-10%), struvite (calcium magnesium ammonium phosphate, 7%-8%), and cystine stones (1%-2%).
  • #6 Kidney stones Information | Mount Sinai – New York
    https://www.mountsinai.org/health-library/report/kidney-stones
    Kidney stones are hard, solid particles that form in the urinary tract. […] The key process in the development of kidney stones is supersaturation. […] Different factors may reduce the volume of urine, or increase the amount of stone-forming chemicals. […] Not having enough of these protective substances can cause stones. […] Changes in the acid balance of the urine can affect stone formation. […] Often, the cause of calcium stones is not known and is referred to as idiopathic (of unknown cause) nephrolithiasis. […] Hypercalciuria is a condition in which there is too much calcium in the urine. It is responsible for as many as 70% of calcium-containing stones. […] Oxalate is the most common stone-forming compound. Too much oxalate in the urine is responsible for up to 60% of calcium stones and is a more common cause of stones than excess calcium in the urine.
  • #7 Nephrolithiasis: Practice Essentials, Background, Anatomy
    https://emedicine.medscape.com/article/437096-overview
    A low fluid intake, with a subsequent low volume of urine production, produces high concentrations of stone-forming solutes in the urine. This is an important, if not the most important, environmental factor in kidney stone formation. The exact nature of the tubular damage or dysfunction that leads to stone formation has not been characterized. […] Most research on the etiology and prevention of urinary tract stone disease has been directed toward the role of elevated urinary levels of calcium, oxalate, and uric acid in stone formation, as well as reduced urinary citrate levels. […] Hypercalciuria is the most common metabolic abnormality. Some cases of hypercalciuria are related to increased intestinal absorption of calcium (associated with excess dietary calcium and/or overactive calcium absorption mechanisms), some are related to excess resorption of calcium from bone (ie, hyperparathyroidism), and some are related to an inability of the renal tubules to properly reclaim calcium in the glomerular filtrate (renal-leak hypercalciuria).
  • #8 Kidney stones – Symptoms and causes – Mayo Clinic
    https://www.mayoclinic.org/diseases-conditions/kidney-stones/symptoms-causes/syc-20355755
    Kidney stones are hard objects made of minerals and salts in urine. They form inside the kidneys. […] Kidney stones have various causes. These include diet, extra body weight, some health conditions, and some supplements and medicines. Kidney stones can affect any of the organs that make urine or remove it from the body from the kidneys to the bladder. Often, stones form when the urine has less water in it. This lets minerals form crystals and stick together. […] Kidney stones develop when the urine contains more crystal-forming substances than the fluid in the urine can dilute. These substances include calcium oxalate, calcium phosphate and uric acid. At the same time, the urine may lack substances that prevent crystals from sticking together. That creates an ideal setting for kidney stones to form.
  • #9 What Causes Kidney Stones? > News > Yale Medicine
    https://www.yalemedicine.org/news/what-causes-kidney-stones
    Urine normally filters out excess salts, minerals, and waste products resulting from the metabolic processes of building proteins and breaking them down within the body, he explains. But when there is too much waste and not enough liquid to dilute it, crystals can develop and combine with other elements to form a stone. […] If you dilute your urine by drinking water or almost any other fluid, you are less likely to form a crystal or a stone. […] Yes. There are four main types of kidney stones: Calcium stones, which include two subtypes: calcium oxalate and calcium phosphate stones. […] Uric acid stones can form when there is too much acid in the urine, which can result from eating too much fish, shellfish, poultry, pork, and meat (especially liver and other organ meats), which have high levels of purines, a common natural chemical compound.
  • #10 Renal Calculi, Nephrolithiasis – StatPearls – NCBI Bookshelf
    https://www.ncbi.nlm.nih.gov/books/NBK442014/
    Renal calculi are a common cause of blood in the urine (hematuria) and pain in the abdomen, flank, or groin. Development of the stones is related to decreased urine volume or increased excretion of stone-forming components such as calcium, oxalate, uric acid, cystine, xanthine, and phosphate. […] Calculi may also be caused by low urinary citrate levels or excessive urinary acidity. […] Urolithiasis occurs when solutes crystallize out of urine to form stones. Urolithiasis may occur due to anatomic features leading to urinary stasis, low urine volume, dietary factors (eg, high oxalate or high sodium), urinary tract infections, systemic acidosis, medications, or, rarely, inheritable genetic factors such as cystinuria. […] Most patients with nephrolithiasis (75%-85%) form calcium stones, most composed primarily of calcium oxalate (monohydrate or dihydrate) or calcium phosphate. The other main types include uric acid (8%-10%), struvite (calcium magnesium ammonium phosphate, 7%-8%), and cystine stones (1%-2%).
  • #11 Kidney stones Information | Mount Sinai – New York
    https://www.mountsinai.org/health-library/report/kidney-stones
    Kidney stones are hard, solid particles that form in the urinary tract. […] The key process in the development of kidney stones is supersaturation. […] Different factors may reduce the volume of urine, or increase the amount of stone-forming chemicals. […] Not having enough of these protective substances can cause stones. […] Changes in the acid balance of the urine can affect stone formation. […] Often, the cause of calcium stones is not known and is referred to as idiopathic (of unknown cause) nephrolithiasis. […] Hypercalciuria is a condition in which there is too much calcium in the urine. It is responsible for as many as 70% of calcium-containing stones. […] Oxalate is the most common stone-forming compound. Too much oxalate in the urine is responsible for up to 60% of calcium stones and is a more common cause of stones than excess calcium in the urine.
  • #12 Renal Calculi, Nephrolithiasis – StatPearls – NCBI Bookshelf
    https://www.ncbi.nlm.nih.gov/books/NBK442014/
    Renal calculi are a common cause of blood in the urine (hematuria) and pain in the abdomen, flank, or groin. Development of the stones is related to decreased urine volume or increased excretion of stone-forming components such as calcium, oxalate, uric acid, cystine, xanthine, and phosphate. […] Calculi may also be caused by low urinary citrate levels or excessive urinary acidity. […] Urolithiasis occurs when solutes crystallize out of urine to form stones. Urolithiasis may occur due to anatomic features leading to urinary stasis, low urine volume, dietary factors (eg, high oxalate or high sodium), urinary tract infections, systemic acidosis, medications, or, rarely, inheritable genetic factors such as cystinuria. […] Most patients with nephrolithiasis (75%-85%) form calcium stones, most composed primarily of calcium oxalate (monohydrate or dihydrate) or calcium phosphate. The other main types include uric acid (8%-10%), struvite (calcium magnesium ammonium phosphate, 7%-8%), and cystine stones (1%-2%).
  • #13 Calcium oxalate stone – Causes, prevention, treatment | National Kidney Foundation
    https://www.kidney.org/kidney-topics/calcium-oxalate-stones
    Calcium oxalate stones are the most common type of kidney stone. Kidney stones are solid masses that form in the kidney when there are high levels of calcium, oxalate, cystine, or phosphate and too little liquid. […] Calcium oxalate stones are caused by too much oxalate in the urine. […] Certain risk factors may cause your body to form calcium oxalate stones. These risk factors include dehydration from not drinking enough fluid, a diet too high in protein, oxalate, sodium (salt), and sugar (like high fructose corn syrup), obesity, and medical conditions like Dent Disease and hyperparathyroidism. […] It is important to know that kidney stones are more common if you have Inflammatory Bowel Disease (IBD). […] The build-up of oxalate can form crystals, which can form kidney stones. […] If your calcium oxalate stones keep coming back, your healthcare provider may test you for these conditions.
  • #14 What causes kidney stones (and what to do) – Harvard Health
    https://www.health.harvard.edu/blog/what-causes-kidney-stones-and-what-to-do-2019051716656
    Stone disease has plagued humanity since ancient times. Kidney stones have been identified in Egyptian mummies. The lifetime risk of kidney stones among adults in the US is approximately 9%, and it appears that global warming may be increasing that risk. […] A risk factor for all stones, regardless of type, is dehydration. […] Calcium phosphate stones are less common than calcium oxalate stones. Causes include hyperparathyroidism (when the body produces too much parathyroid hormone), renal tubular acidosis (a kidney condition that causes a buildup of acid in the body), and urinary tract infections. It is important to understand if one of these conditions is behind the formation of calcium phosphate stones. […] Most patients with uric acid stones don’t have too much uric acid. Instead their urine is too acidic. When that happens, normal levels of uric acid dissolve into the urine where it can crystalize into stones. […] The most common cause of struvite stones is a bacterial infection that raises the urine pH to neutral or alkaline. […] Cystinuria is a genetic condition. It results in high levels of cystine (an amino acid) in the urine, which then forms into kidney stones.
  • #15
    https://www.aurorahealthcare.org/services/urology/kidney-stones
    Kidney stones are caused by a buildup of chemicals and wastes in your kidneys. Your kidneys filter substances out of your blood such as minerals, waste products and excess water-soluble vitamins. When these substances accumulate in the kidneys they form a stone-like mass. These stone-forming substances include: […] Common causes of kidney stones include: Not drinking enough water, a diet consisting of foods that can cause kidney stones such as food that’s high in animal protein, salt and sugar, a family history of kidney stones, medical conditions such as high blood pressure, diabetes, obesity and hypercalciuria (high calcium levels in urine), some medications, such as diuretics, calcium-based antacids and certain antibiotics. […] Calcium phosphate kidney stones are caused by an abnormally functioning urinary tract and often form at the same time as calcium oxalate stones.
  • #16 Renal Calculi, Nephrolithiasis – StatPearls – NCBI Bookshelf
    https://www.ncbi.nlm.nih.gov/books/NBK442014/
    The most common causes of urinary stone disease are inadequate hydration and low urine volume. The 4 most common chemical factors contributing to urinary stone formation are hypercalciuria, hyperoxaluria, hyperuricosuria, and hypocitraturia. […] The 4 major types and causes of renal calculi include: Calcium stones: due to hyperparathyroidism, renal calcium leak, absorptive or idiopathic hypercalciuria, hyperoxaluria, hypomagnesemia, and hypocitraturia. […] Uric acid stones: associated with a pH of less than 5.5, a high intake of purine-rich foods (fish, legumes, meat), or cancer; may also be associated with gout. […] Struvite stones: caused by Gram-negative, urease-producing organisms that break down urea into ammonia. […] Cystine stones: due to an intrinsic metabolic defect causing the failure of the renal tubules to reabsorb cystine, lysine, ornithine, and arginine.
  • #17 Nephrolithiasis: Practice Essentials, Background, Anatomy
    https://emedicine.medscape.com/article/437096-overview
    Calcium stones account for 75% of renal calculi. Recent data suggest that a low-protein, low-salt diet may be preferable to a low-calcium diet in hypercalciuric stone formers for preventing stone recurrences. […] Epidemiological studies have shown that the incidence of stone disease is inversely related to the magnitude of dietary calcium intake in first-time stone formers, because greater fractional absorption of calcium occurs when intake is lower. […] Struvite stones account for 15% of renal calculi. They are associated with chronic urinary tract infection (UTI) with gram-negative, urease-positive organisms that split urea into ammonia, which then combines with phosphate and magnesium to crystalize into a calculus. […] Uric acid stones account for 6% of renal calculi. These are associated with urine pH less than 5.5, high purine intake (eg, organ meats, legumes, fish, meat extracts, gravies), or malignancy (ie, rapid cell turnover). […] Cystine stones account for 2% of renal calculi. They arise because of an intrinsic metabolic defect resulting in failure of renal tubular reabsorption of cystine, ornithine, lysine, and arginine. Urine becomes supersaturated with cystine, with resultant crystal deposition.
  • #18 What causes kidney stones (and what to do) – Harvard Health
    https://www.health.harvard.edu/blog/what-causes-kidney-stones-and-what-to-do-2019051716656
    Stone disease has plagued humanity since ancient times. Kidney stones have been identified in Egyptian mummies. The lifetime risk of kidney stones among adults in the US is approximately 9%, and it appears that global warming may be increasing that risk. […] A risk factor for all stones, regardless of type, is dehydration. […] Calcium phosphate stones are less common than calcium oxalate stones. Causes include hyperparathyroidism (when the body produces too much parathyroid hormone), renal tubular acidosis (a kidney condition that causes a buildup of acid in the body), and urinary tract infections. It is important to understand if one of these conditions is behind the formation of calcium phosphate stones. […] Most patients with uric acid stones don’t have too much uric acid. Instead their urine is too acidic. When that happens, normal levels of uric acid dissolve into the urine where it can crystalize into stones. […] The most common cause of struvite stones is a bacterial infection that raises the urine pH to neutral or alkaline. […] Cystinuria is a genetic condition. It results in high levels of cystine (an amino acid) in the urine, which then forms into kidney stones.
  • #19 Renal Calculi, Nephrolithiasis – StatPearls – NCBI Bookshelf
    https://www.ncbi.nlm.nih.gov/books/NBK442014/
    The most common causes of urinary stone disease are inadequate hydration and low urine volume. The 4 most common chemical factors contributing to urinary stone formation are hypercalciuria, hyperoxaluria, hyperuricosuria, and hypocitraturia. […] The 4 major types and causes of renal calculi include: Calcium stones: due to hyperparathyroidism, renal calcium leak, absorptive or idiopathic hypercalciuria, hyperoxaluria, hypomagnesemia, and hypocitraturia. […] Uric acid stones: associated with a pH of less than 5.5, a high intake of purine-rich foods (fish, legumes, meat), or cancer; may also be associated with gout. […] Struvite stones: caused by Gram-negative, urease-producing organisms that break down urea into ammonia. […] Cystine stones: due to an intrinsic metabolic defect causing the failure of the renal tubules to reabsorb cystine, lysine, ornithine, and arginine.
  • #20 Nephrolithiasis: Practice Essentials, Background, Anatomy
    https://emedicine.medscape.com/article/437096-overview
    Calcium stones account for 75% of renal calculi. Recent data suggest that a low-protein, low-salt diet may be preferable to a low-calcium diet in hypercalciuric stone formers for preventing stone recurrences. […] Epidemiological studies have shown that the incidence of stone disease is inversely related to the magnitude of dietary calcium intake in first-time stone formers, because greater fractional absorption of calcium occurs when intake is lower. […] Struvite stones account for 15% of renal calculi. They are associated with chronic urinary tract infection (UTI) with gram-negative, urease-positive organisms that split urea into ammonia, which then combines with phosphate and magnesium to crystalize into a calculus. […] Uric acid stones account for 6% of renal calculi. These are associated with urine pH less than 5.5, high purine intake (eg, organ meats, legumes, fish, meat extracts, gravies), or malignancy (ie, rapid cell turnover). […] Cystine stones account for 2% of renal calculi. They arise because of an intrinsic metabolic defect resulting in failure of renal tubular reabsorption of cystine, ornithine, lysine, and arginine. Urine becomes supersaturated with cystine, with resultant crystal deposition.
  • #21
    https://www.aurorahealthcare.org/services/urology/kidney-stones
    These rare kidney stones are caused by a genetic disorder that leads to excessive levels of the amino acid cystine in the urine. […] These types of kidney stones are more common in women and form because of frequent urinary tract infections (UTIs). […] Uric acid stones are more common in men and in people who eat a diet high in animal protein or don’t drink enough water.
  • #22 Renal Calculi, Nephrolithiasis – StatPearls – NCBI Bookshelf
    https://www.ncbi.nlm.nih.gov/books/NBK442014/
    The most common causes of urinary stone disease are inadequate hydration and low urine volume. The 4 most common chemical factors contributing to urinary stone formation are hypercalciuria, hyperoxaluria, hyperuricosuria, and hypocitraturia. […] The 4 major types and causes of renal calculi include: Calcium stones: due to hyperparathyroidism, renal calcium leak, absorptive or idiopathic hypercalciuria, hyperoxaluria, hypomagnesemia, and hypocitraturia. […] Uric acid stones: associated with a pH of less than 5.5, a high intake of purine-rich foods (fish, legumes, meat), or cancer; may also be associated with gout. […] Struvite stones: caused by Gram-negative, urease-producing organisms that break down urea into ammonia. […] Cystine stones: due to an intrinsic metabolic defect causing the failure of the renal tubules to reabsorb cystine, lysine, ornithine, and arginine.
  • #23 Nephrolithiasis: Practice Essentials, Background, Anatomy
    https://emedicine.medscape.com/article/437096-overview
    Calcium stones account for 75% of renal calculi. Recent data suggest that a low-protein, low-salt diet may be preferable to a low-calcium diet in hypercalciuric stone formers for preventing stone recurrences. […] Epidemiological studies have shown that the incidence of stone disease is inversely related to the magnitude of dietary calcium intake in first-time stone formers, because greater fractional absorption of calcium occurs when intake is lower. […] Struvite stones account for 15% of renal calculi. They are associated with chronic urinary tract infection (UTI) with gram-negative, urease-positive organisms that split urea into ammonia, which then combines with phosphate and magnesium to crystalize into a calculus. […] Uric acid stones account for 6% of renal calculi. These are associated with urine pH less than 5.5, high purine intake (eg, organ meats, legumes, fish, meat extracts, gravies), or malignancy (ie, rapid cell turnover). […] Cystine stones account for 2% of renal calculi. They arise because of an intrinsic metabolic defect resulting in failure of renal tubular reabsorption of cystine, ornithine, lysine, and arginine. Urine becomes supersaturated with cystine, with resultant crystal deposition.
  • #24 Kidney Stones (for Teens) | Nemours KidsHealth
    https://kidshealth.org/en/teens/kidney-stones.html
    Kidney stones happen when minerals form crystals inside the kidneys. Then they get bigger and become kidney stones. […] Most teens who get kidney stones have a health condition that increases their risk for them. These include: some medicines, special diets, like a ketogenic diet that is sometimes used to prevent seizures, diabetes, obesity, problems with how the urinary tract is formed, metabolic disorders, other kidney conditions, conditions that affect the thyroid or parathyroid gland, some urinary tract infections (UTIs). […] Other things that can make a kidney stone more likely are: not drinking enough water, eating too much salt, not having enough citric acid in the urine, having too much calcium in the urine. […] Some types of kidney stones run in families, so having a relative with kidney stones can make a person more likely to get them. Teens who have had kidney stones before are more likely to get them again.
  • #25 Genetics of kidney stone disease | Nature Reviews Urology
    https://www.nature.com/articles/s41585-020-0332-x
    Kidney stone disease (nephrolithiasis) is a common problem that can be associated with alterations in urinary solute composition including hypercalciuria. […] Studies suggest that the prevalence of monogenic kidney stone disorders, including renal tubular acidosis with deafness, Bartter syndrome, primary hyperoxaluria and cystinuria, in patients attending kidney stone clinics is 15%. […] For the majority of individuals, nephrolithiasis has a multifactorial aetiology involving genetic and environmental factors. […] Nonetheless, the genetic influence on stone formation in these idiopathic stone formers remains considerable and twin studies estimate a heritability of 45% for nephrolithiasis and 50% for hypercalciuria. […] The contribution of polygenic influences from multiple loci have been investigated by genome-wide association and candidate gene studies, which indicate that a number of genes and molecular pathways contribute to the risk of stone formation.
  • #26 Renal Calculi, Nephrolithiasis – StatPearls – NCBI Bookshelf
    https://www.ncbi.nlm.nih.gov/books/NBK442014/
    Many drugs are known to cause renal stones, including the following: Atazanavir, Guaifenesin, Indinavir, Silicate overuse, Sulfonamide, Triamterene. […] There also appears to be a genetic association with the production of renal calculi. […] Nephrolithiasis risk factors include the following: A positive family history of urolithiasis increases the incidence of new stone formation 2.5-fold. […] A prior personal history of urolithiasis increases the risk of new renal stones by 15% during the first year and an average of 50% over the following 10 years. […] Diabetes, hypertension, gout, male sex, metabolic syndrome, and obesity appear to increase the risk of urolithiasis. […] Increased urinary acidity (pH 5) promotes uric acid stone formation. […] Increased oxalate absorption (from malabsorption syndromes, gastro bypass surgery, and similar) can greatly increase urinary oxalate levels and calcium oxalate stone production.
  • #27 Hereditary causes of kidney stones – InsightsGenetic kidney stone panelPrimary and secondary hyperoxaluria
    https://news.mayocliniclabs.com/renal/urinary-stone-services/hereditary-causes-of-kidney-stones/
    Genetic causes can be linked to kidney stone development. Renal tubular loss of electrolytes or protein or the development of kidney calculi can signal underlying metabolic, endocrine, or renal tubular dysfunction that is genetic in origin, especially when symptoms are present in utero, infancy, or adolescence. […] When the presence or severity of electrolyte imbalance or kidney stones cannot be explained by acquired causes or when there are multiple cases clustered within a family, genetic testing for the inherited causes of kidney or extrarenal impairment of osmoregulation may be considered. […] Primary hyperoxaluria is an inherited error of metabolism due to defective enzyme activity and is classified into types 1, 2, and 3. Increased urine concentrations of oxalate along with glycolate (type 1), glycerate (type 2), or 4-hydroxy-2-oxoglutarate (type 3), suggest a specific primary hyperoxaluria type. Follow-up genetic testing can confirm diagnosis.
  • #28 Kidney stones – Symptoms and causes – Mayo Clinic
    https://www.mayoclinic.org/diseases-conditions/kidney-stones/symptoms-causes/syc-20355755
    Factors that raise your risk of kidney stones include: Family or personal history. If someone in your family has had kidney stones, you’re more likely to develop stones too. If you’ve already had one or more kidney stones, you’re at higher risk of getting another. […] Dehydration. Not drinking enough water each day can raise your risk of kidney stones. […] Some diets. Eating a diet that’s high in oxalate, protein, sodium and sugar may raise your risk of some types of kidney stones. […] Obesity. This complex disease involves having too much body fat, and it’s been linked with a higher risk of kidney stones. […] Other health conditions such as renal tubular acidosis, cystinuria, hyperparathyroidism and repeated urinary tract infections also can raise the risk of kidney stones. A rare genetic condition called primary hyperoxaluria raises the risk of calcium oxalate stones. […] Some supplements and medicines. These include vitamin C, dietary supplements, overuse of laxatives, calcium-based antacids, and some medicines for migraines or depression.
  • #29 What Could be Causing Your Recurrent Kidney Stones?: Urology Associates Medical Group: Urologists
    https://www.urologymedicalgroup.com/blog/what-could-be-causing-your-recurrent-kidney-stones
    But for some people, certain hereditary or genetic conditions may cause recurrent stones. These include: Cystinuria, a condition that elevates the levels of cystine in your urine, an amino acid that can crystalize and form stones; Primary hyperoxaluria, a group of genetic disorders that cause your liver to produce too much oxalate, which can crystalize and form stones; Cystic fibrosis, a condition linked to an increase in oxalate and a decrease in the chemical needed to break down oxalate; GI conditions that trigger chronic diarrhea, such as Crohns disease, inflammatory bowel disorder, hyperparathyroidism, gout, diabetes, gastric bypass, and obesity.
  • #30 Kidney Stone: Symptoms, Causes, Treatment, and More
    https://www.healthline.com/health/kidney-stones
    Kidney stones can be a painful medical issue. The causes of kidney stones vary according to the type of stones. […] Different factors can increase your risk of developing a stone. In the United States, white people are more likely to have kidney stones than Black people. […] A history of kidney stones can increase your risk. So does a family history of kidney stones. […] Other risk factors include: dehydration, obesity, a diet with high levels of protein, salt, or glucose, hyperparathyroid condition, gastric bypass surgery, inflammatory bowel diseases that increase calcium absorption, taking medications such as triamterene diuretics, antiseizure drugs, and calcium-based antacids. […] Animal proteins like meat, poultry, seafood, and dairy products can increase levels of uric acid in your urine and increase the risk of developing kidney stones.
  • #31 Causes and Risk Factors
    https://www.mykidneystone.com/en-US/basics/causes-risk-factors.html
    While anyone can get a kidney stone, some people are more at risk. Stones are more common in men than women. Some ethnicities such as non-Hispanic Caucasians are affected at a higher rate. If you are overweight or obese, you are more likely to develop a stone. Diet and lifestyle may play a big role in the cause of your kidney stone as well. […] A kidney stone forms when substances in your urine become highly concentrated which makes fluid intake one of the biggest contributing factors. If you do not drink enough water, you may put yourself at a higher risk for developing a stone. […] Other possible causes include: Exercise (too much or too little), Family or personal history of kidney stones, Food with too much salt or sugar, Infections, Medications, Obesity, Weight-loss surgery. […] You may be at an increased risk to develop a kidney stone if you have: Blockage of your urinary tract, Chronic inflammation of your bowel, Cystic kidney disease Disorder that causes fluid-filled sacs to form on your kidneys, Cystinuria Condition in which your urine contains high levels of the amino acid cystine, Family history of kidney stones, Gout Disorder that causes painful swelling of your joints, History of gastrointestinal tract surgery, Hypercalciuria Genetic condition in which your urine contains high levels of calcium, Hyperoxaluria Condition in which your urine contains high levels of oxalate, Hyperparathyroidism Condition in which the parathyroid glands in your neck release too many hormones, generating extra calcium in your blood, Hyperuricosuria Condition in which your urine contains high levels of uric acid, Renal tubular acidosis Disease in which your kidneys fail to excrete acids into urine, causing your blood to remain too acidic and the urine to be too alkaline.
  • #32 Renal Calculi, Nephrolithiasis – StatPearls – NCBI Bookshelf
    https://www.ncbi.nlm.nih.gov/books/NBK442014/
    Many drugs are known to cause renal stones, including the following: Atazanavir, Guaifenesin, Indinavir, Silicate overuse, Sulfonamide, Triamterene. […] There also appears to be a genetic association with the production of renal calculi. […] Nephrolithiasis risk factors include the following: A positive family history of urolithiasis increases the incidence of new stone formation 2.5-fold. […] A prior personal history of urolithiasis increases the risk of new renal stones by 15% during the first year and an average of 50% over the following 10 years. […] Diabetes, hypertension, gout, male sex, metabolic syndrome, and obesity appear to increase the risk of urolithiasis. […] Increased urinary acidity (pH 5) promotes uric acid stone formation. […] Increased oxalate absorption (from malabsorption syndromes, gastro bypass surgery, and similar) can greatly increase urinary oxalate levels and calcium oxalate stone production.
  • #33 What Causes Kidney Stones? > News > Yale Medicine
    https://www.yalemedicine.org/news/what-causes-kidney-stones
    Struvite stones (also known as infection stones) are associated with urinary tract infections (UTIs). […] Cystine stones. A rare, inherited disease called cystinuria causes an amino acid (cysteine) to leak from the kidneys to the urine, where it may cause stones to form. […] While each type of kidney stone is unique, there are recommendations that can help prevent any kind of kidney stone. The main one is hydration. […] A healthy diet can also help, and studies show the Dietary Approaches to Stop Hypertension (DASH) diet can reduce the risk of kidney stones. […] Because calcium can block other substances in the digestive tract that cause stones, it helps to include calcium-rich foods in your diet, such as milk, cheese, yogurt, and leafy greens. […] It may also help to know that certain conditions, including gout, obesity, and diabetes mellitus, can put you at a higher risk for kidney stones. […] Another risk factor is a family history of kidney stones. […] Kidney stone recurrence is not uncommon; rates may be as high as 50% within five to seven years.
  • #34 Recurrent Kidney Stones: Causes, Symptoms, and Prevention | BASS Medical Group
    https://www.bassmedicalgroup.com/blog-post/what-might-cause-recurrent-kidney-stones
    If you’ve had more than one kidney stone, you’re more likely to develop another. In fact, about 50% of people who’ve had one kidney stone will develop another within 5 to 7 years. […] Some possible causes of recurrent kidney stones include: Poor hydration habits (not consistently drinking enough water), Consistently high-sodium or high-protein diets, Unmanaged underlying conditions, like diabetes or chronic UTIs, Inherited disorders like cystinuria or primary hyperoxaluria, which cause excess minerals in urine, Obesity, which alters urine composition and increases acid levels. […] The key to prevention is identifying and managing these underlying causes.
  • #35 Renal Calculi, Nephrolithiasis – StatPearls – NCBI Bookshelf
    https://www.ncbi.nlm.nih.gov/books/NBK442014/
    Low urinary volume due to inadequate fluid intake leads to relative dehydration with increased urinary concentrations and crystal formation. […] Urinary tract infections increase urinary pH in the presence of bacteria that produce urease, predisposing the patient to struvite calculi formation. […] In general, higher total dietary fiber, fruit, and vegetable intake, reduced animal meat protein, and a low sodium diet tend to reduce nephrolithiasis. […] A moderate calcium (dairy) intake is also recommended.
  • #36 Nephrolithiasis: Practice Essentials, Background, Anatomy
    https://emedicine.medscape.com/article/437096-overview
    A low fluid intake, with a subsequent low volume of urine production, produces high concentrations of stone-forming solutes in the urine. This is an important, if not the most important, environmental factor in kidney stone formation. The exact nature of the tubular damage or dysfunction that leads to stone formation has not been characterized. […] Most research on the etiology and prevention of urinary tract stone disease has been directed toward the role of elevated urinary levels of calcium, oxalate, and uric acid in stone formation, as well as reduced urinary citrate levels. […] Hypercalciuria is the most common metabolic abnormality. Some cases of hypercalciuria are related to increased intestinal absorption of calcium (associated with excess dietary calcium and/or overactive calcium absorption mechanisms), some are related to excess resorption of calcium from bone (ie, hyperparathyroidism), and some are related to an inability of the renal tubules to properly reclaim calcium in the glomerular filtrate (renal-leak hypercalciuria).
  • #37 What causes kidney stones and ways you can try to avoid themmenu iconsearch iconsubscribe iconsearch iconarrow up right icon
    https://health.ucdavis.edu/blog/cultivating-health/what-causes-kidney-stones-and-ways-you-can-try-to-avoid-them/2024/10
    About 500,000 emergency department visits each year are due to kidney stone issues. About 1 in 10 people will have a kidney stone at some point in their lives, according to the National Kidney Foundation. They are most common in men in their 40s and 50s. […] Kidney stones are made up of common minerals found in urine. These minerals crystalize and form stones when there is an imbalance. This could mean too much or too little of a certain mineral, or that the concentration of certain minerals is too high. […] Some causes of kidney stones are out of your control (such as genetics). However, the things you eat can play a role in the formation of kidney stones. Other conditions, such as diabetes and gout, can contribute to kidney stones. […] Not enough fluids: Not staying hydrated and drinking enough fluid is probably the biggest risk factor for kidney stones.
  • #38 What Causes Kidney Stones?
    https://health.utoledo.edu/podcast/what-causes-kidney-stones/index.html
    Genetics is number one player. The other thing that plays is environmental factors. Heat is going to play a role, so if you are having too much of hot weather and you don’t have enough fluid to drink to hydrate yourself, then you can have a problem with kidney stones. […] The next one will be also the diet, some of the diet issues can cause some of the stones. If you are drinking or eating something that have a lot of high protein, for example, this can cause stones. […] Some diseases, some people would have metabolic issues. Sarcoidosis, parathyroid hormone, high calcium level, cystine stones in kids, these are all things can cause increased chance of stones. People with Crohn’s disease, or diabetes, obesity, they might have increased risk of stones. […] Once you have a stone, you are always going to have a stone, it’s a matter of when. Whenever someone has a stone, whenever they are younger age, 15, 16, 20, this means they have a long life, then there are many chances of stones. This is why we tell them about some, kind of call it prevention of stones, but it’s not really preventing the stones, but it helps to overcome the chance of stones coming back. Usually, depending on the study you look at, there are 20 to 50% chances of having the stone comes back again within 10 years.
  • #39 What causes kidney stones and ways you can try to avoid themmenu iconsearch iconsubscribe iconsearch iconarrow up right icon
    https://health.ucdavis.edu/blog/cultivating-health/what-causes-kidney-stones-and-ways-you-can-try-to-avoid-them/2024/10
    Foods high in salt: Limit canned foods, prepackaged meals and adding sodium to your food. Sodium can raise the levels of calcium in your urine. […] Animal proteins: Too much of all animal proteins, including chicken, beef, pork, or fish can increase your risk of kidney stones. No animal protein is better than any other when it comes to kidney stones. […] One common misunderstanding is that eating foods with calcium can contribute to kidney stones. However, it’s the exact opposite. Not eating enough foods with calcium actually increases your risk of kidney stones. This is because a low-calcium diet will often lead to too much oxalate in your urine. Oxalate is a mineral found in many foods and commonly found in kidney stones. By eating calcium, you can help lower the oxalate level in your urine.
  • #40 Causes and Risk Factors of Kidney Stones
    https://www.health.com/kidney-stones-causes-7551677
    Kidney stones are solid deposits that form in the kidneys when you have high levels of certain minerals in your urine, such as calcium and uric acid. This can happen when an excess amount of waste in your urine crystallizes (begins to form crystals) and slowly develops into stones. You can develop kidney stones for a variety of reasons, including eating certain diets or taking some medications. […] Certain diets, like those high in sodium (salt) and animal meat, may increase your risk of developing kidney stones. Eating an excess amount of animal meat can increase the amount of acid in your urine, paving the way for kidney stones to form. Additionally, having too much calcium in your urine is a leading cause of kidney stones. High-sodium diets can prevent your urine from reabsorbing calcium which can lead to an overflow of calcium in your urine and increase your risk of developing stones.
  • #41 What causes kidney stones and ways you can try to avoid themmenu iconsearch iconsubscribe iconsearch iconarrow up right icon
    https://health.ucdavis.edu/blog/cultivating-health/what-causes-kidney-stones-and-ways-you-can-try-to-avoid-them/2024/10
    Foods high in salt: Limit canned foods, prepackaged meals and adding sodium to your food. Sodium can raise the levels of calcium in your urine. […] Animal proteins: Too much of all animal proteins, including chicken, beef, pork, or fish can increase your risk of kidney stones. No animal protein is better than any other when it comes to kidney stones. […] One common misunderstanding is that eating foods with calcium can contribute to kidney stones. However, it’s the exact opposite. Not eating enough foods with calcium actually increases your risk of kidney stones. This is because a low-calcium diet will often lead to too much oxalate in your urine. Oxalate is a mineral found in many foods and commonly found in kidney stones. By eating calcium, you can help lower the oxalate level in your urine.
  • #42 What Causes Kidney Stones? – Risk Factors and More | CommonSpirit Health
    https://www.chisaintjosephhealth.org/blogs/what-causes-kidney-stones
    Eating a lot of meat, especially red meat, contributes to kidney stone formation. Animal proteins contain purines, releasing uric acid into the urine and increasing the excretion of calcium and oxalate. Eating less animal protein, maintaining a balanced diet, and staying hydrated can lower the risk of kidney stones. […] Being overweight increases the chance of kidney stones, as excess body weight can alter urinary function. Maintaining a healthy weight through a balanced diet and exercise can help mitigate this risk. […] Certain foods rich in oxalates, such as beets, nuts, chocolate and certain berries, can contribute to the formation of calcium oxalate stones. […] Paradoxically, not having enough calcium in your diet may lead to an increased risk of kidney stones. Calcium binds with oxalate in the intestines, and if there’s not enough calcium, then the excess oxalate can be absorbed into the bloodstream and excreted through the kidneys.
  • #43 What Causes Kidney Stones & How to Prevent Them | Britannica
    https://www.britannica.com/video/kidney-stones/-207674
    Kidney stones form when certain chemicals become concentrated in the person’s urine to form crystals. The crystals grow into larger masses which can make their way through the urinary tract. If the stone gets stuck somewhere and blocks the flow of urine, ouch. So what are the chemicals that form these crystals? One of the most common is oxalate, which can be found in many foods including beets, nuts, chocolate, and tea. When too much oxalate in the urine binds with calcium in the body, crystals begin to aggregate and form a stone. […] Too much phosphate in the urine from eating foods such as cheese, nuts, sardines, and yes kidney beans, can also cause stones. Similarly, when a person’s pee contains too much uric acid, that can spell trouble. The body makes uric acid and expels it as a way of metabolising protein.
  • #44 Recurrent Nephrolithiasis in Adults: A Comparative Effectiveness Review of Preventive Medical Strategies | Effective Health Care (EHC) Program
    https://effectivehealthcare.ahrq.gov/products/kidney-stone-prevention/research-protocol
    Dietary interventions are designed primarily to alter the concentration of one or more crystal-forming and/or crystal-inhibiting substances in the urine. […] Previous systematic reviews of RCTs of pharmacological therapies have reported that although thiazide diuretics and citrate therapy reduce stone recurrence, evidence was insufficient for the efficacy of other pharmacological treatments. […] There is significant variation in current medical practice regarding management to prevent recurrent nephrolithiasis. Clinical uncertainty exists regarding the effectiveness, comparative effectiveness, and adverse effects of different dietary and pharmacological preventive treatments; the value of urine and blood biochemical measures for initiating and/or modifying treatment; and the potential impact of patient and stone characteristics on important treatment outcomes.
  • #45 What’s Causing Your Recurring Kidney Stones?: Urology Center of Florida: Urologists
    https://www.urologycenterofflorida.com/blog/whats-causing-your-recurring-kidney-stones
    Kidney stones, also known as nephrolithiasis, are a painful but common condition for millions of Americans. Its estimated that 12% of people in the U.S. will develop these stones in their lifetime, and it can affect both men and women, though women suffer from kidney stones less than men. […] After a kidney stone, its helpful to get a handle on what factors may have caused it. This applies especially if youve had more than one, as its usually a sign something in your diet or lifestyle needs to change. […] The hard deposits of minerals and salts that make up kidney stones happen when your urine doesnt dissolve enough of these materials, leaving stones that can affect any part of the urinary system. […] There are many risk factors for kidney stones. Some of them are a matter of your weight or diet, especially if youre dehydrated or your diet is high in protein, salt, or sugar.
  • #46 What causes kidney stones and ways you can try to avoid themmenu iconsearch iconsubscribe iconsearch iconarrow up right icon
    https://health.ucdavis.edu/blog/cultivating-health/what-causes-kidney-stones-and-ways-you-can-try-to-avoid-them/2024/10
    Foods high in salt: Limit canned foods, prepackaged meals and adding sodium to your food. Sodium can raise the levels of calcium in your urine. […] Animal proteins: Too much of all animal proteins, including chicken, beef, pork, or fish can increase your risk of kidney stones. No animal protein is better than any other when it comes to kidney stones. […] One common misunderstanding is that eating foods with calcium can contribute to kidney stones. However, it’s the exact opposite. Not eating enough foods with calcium actually increases your risk of kidney stones. This is because a low-calcium diet will often lead to too much oxalate in your urine. Oxalate is a mineral found in many foods and commonly found in kidney stones. By eating calcium, you can help lower the oxalate level in your urine.
  • #47 What Causes Kidney Stones? > News > Yale Medicine
    https://www.yalemedicine.org/news/what-causes-kidney-stones
    Struvite stones (also known as infection stones) are associated with urinary tract infections (UTIs). […] Cystine stones. A rare, inherited disease called cystinuria causes an amino acid (cysteine) to leak from the kidneys to the urine, where it may cause stones to form. […] While each type of kidney stone is unique, there are recommendations that can help prevent any kind of kidney stone. The main one is hydration. […] A healthy diet can also help, and studies show the Dietary Approaches to Stop Hypertension (DASH) diet can reduce the risk of kidney stones. […] Because calcium can block other substances in the digestive tract that cause stones, it helps to include calcium-rich foods in your diet, such as milk, cheese, yogurt, and leafy greens. […] It may also help to know that certain conditions, including gout, obesity, and diabetes mellitus, can put you at a higher risk for kidney stones. […] Another risk factor is a family history of kidney stones. […] Kidney stone recurrence is not uncommon; rates may be as high as 50% within five to seven years.
  • #48 Renal Calculi, Nephrolithiasis – StatPearls – NCBI Bookshelf
    https://www.ncbi.nlm.nih.gov/books/NBK442014/
    Many drugs are known to cause renal stones, including the following: Atazanavir, Guaifenesin, Indinavir, Silicate overuse, Sulfonamide, Triamterene. […] There also appears to be a genetic association with the production of renal calculi. […] Nephrolithiasis risk factors include the following: A positive family history of urolithiasis increases the incidence of new stone formation 2.5-fold. […] A prior personal history of urolithiasis increases the risk of new renal stones by 15% during the first year and an average of 50% over the following 10 years. […] Diabetes, hypertension, gout, male sex, metabolic syndrome, and obesity appear to increase the risk of urolithiasis. […] Increased urinary acidity (pH 5) promotes uric acid stone formation. […] Increased oxalate absorption (from malabsorption syndromes, gastro bypass surgery, and similar) can greatly increase urinary oxalate levels and calcium oxalate stone production.
  • #49 Kidney Stones: Causes, Symptoms, and Treatment
    https://www.verywellhealth.com/kidney-stones-5212960
    Risk factors for calcium oxalate stones include: Dehydration, Obesity, A diet high in animal proteins, sodium, and sugar, A high intake of oxalate-rich foods like spinach, beets, and almonds, Hyperparathyroidism (a hormonal condition that results in too much calcium in the blood), Ulcerative colitis and Crohn’s disease (inflammatory bowel diseases), Inherited conditions like primary hyperoxaluria (the body produces too much oxalate), The overuse of calcium or vitamin C supplements, Gastric bypass surgery. […] Risk factors for calcium phosphate stones include: Dehydration, High sodium intake, Metabolic disorders like renal tubular acidosis (the kidneys are unable to remove enough acid or keep enough base). […] Risk factors for cystine stones include: Cystinuria, Dehydration, High sodium intake, A diet rich in animal proteins.
  • #50 Kidney Stones: Causes, Symptoms, and Treatment
    https://www.webmd.com/kidney-stones/kidney-stone-causes
    Hyperparathyroidism. Your parathyroid glands can pump out too much parathyroid hormone, which raises calcium levels in your blood and pee. […] Metabolic syndrome. This is a cluster of conditions–including high blood fats, obesity, and high blood pressure–that raise your risk for serious conditions like heart disease and stroke. Metabolic syndrome is also linked to kidney stones. […] Research has found a link between high levels of stress and kidney stones. Scientists think that the chemical changes stress causes in your body increases substances like calcium, oxalate, and uric acid in your pee. It also reduces the volume of pee. All these things can contribute to kidney stones. […] There’s no one cause of kidney stones, which happen when minerals and other substances in your pee cluster together and form hard deposits. But many things can contribute to them, including not drinking enough water; your personal and family history; your diet; and other health conditions you have.
  • #51 Renal Calculi, Nephrolithiasis – StatPearls – NCBI Bookshelf
    https://www.ncbi.nlm.nih.gov/books/NBK442014/
    Many drugs are known to cause renal stones, including the following: Atazanavir, Guaifenesin, Indinavir, Silicate overuse, Sulfonamide, Triamterene. […] There also appears to be a genetic association with the production of renal calculi. […] Nephrolithiasis risk factors include the following: A positive family history of urolithiasis increases the incidence of new stone formation 2.5-fold. […] A prior personal history of urolithiasis increases the risk of new renal stones by 15% during the first year and an average of 50% over the following 10 years. […] Diabetes, hypertension, gout, male sex, metabolic syndrome, and obesity appear to increase the risk of urolithiasis. […] Increased urinary acidity (pH 5) promotes uric acid stone formation. […] Increased oxalate absorption (from malabsorption syndromes, gastro bypass surgery, and similar) can greatly increase urinary oxalate levels and calcium oxalate stone production.
  • #52 Causes and Risk Factors
    https://www.mykidneystone.com/en-US/basics/causes-risk-factors.html
    You may also have an elevated risk of kidney stones if you take certain medications, such as: Calcium-based antacids, Diuretics Medication that helps kidneys remove fluid from your body, Indinavir (Crixivan) Protease inhibitor used to treat HIV infection, Topiramate (Topamax) Anti-seizure medication.
  • #53 What’s Causing Your Recurring Kidney Stones?: Urology Center of Florida: Urologists
    https://www.urologycenterofflorida.com/blog/whats-causing-your-recurring-kidney-stones
    Kidney stones are more likely to recur if you dont address your personal risk factors, including weight and diet. Not drinking enough water, diets that are low in calcium, potassium, magnesium, and are high in sodium can all lead to multiple kidney stones if changes are not made. […] Some medications for treating migraines and depression, calcium based antacids, excessive use of laxatives, and even taking vitamin C can increase chances of kidney stones. […] Changing medications, increasing your water intake and modifying your diet (more calcium rich food, less salt, oxalates, and animal proteins) are simple ways to lower your chances of getting kidney stones in the future.
  • #54 Kidney Stone: Symptoms, Causes, Treatment, and More
    https://www.healthline.com/health/kidney-stones
    Kidney stones can be a painful medical issue. The causes of kidney stones vary according to the type of stones. […] Different factors can increase your risk of developing a stone. In the United States, white people are more likely to have kidney stones than Black people. […] A history of kidney stones can increase your risk. So does a family history of kidney stones. […] Other risk factors include: dehydration, obesity, a diet with high levels of protein, salt, or glucose, hyperparathyroid condition, gastric bypass surgery, inflammatory bowel diseases that increase calcium absorption, taking medications such as triamterene diuretics, antiseizure drugs, and calcium-based antacids. […] Animal proteins like meat, poultry, seafood, and dairy products can increase levels of uric acid in your urine and increase the risk of developing kidney stones.
  • #55 Kidney stones – Diagnosis and treatment – Mayo Clinic
    https://www.mayoclinic.org/diseases-conditions/kidney-stones/diagnosis-treatment/drc-20355759
    Diagnosis also can include testing to find the cause and chemical makeup of kidney stones. […] Your healthcare professional uses this information to find out what’s causing your kidney stones and to form a plan to prevent more kidney stones. […] Some rare conditions that pass from parent to child make kidney stones more likely. For instance, having cystinuria raises the risk of cystine stones. Primary hyperoxaluria raises the risk of calcium oxalate stones. […] Kidney stones that are too large to pass on their own may need more-extensive treatment. […] Some calcium phosphate stones are caused by overactive parathyroid glands. […] When these glands make too much parathyroid hormone, that’s a condition known as hyperparathyroidism. The condition can cause calcium levels to become too high, and kidney stones may form as a result.
  • #56 Kidney Stones: Causes, Symptoms, and Treatment
    https://www.webmd.com/kidney-stones/kidney-stone-causes
    Hyperparathyroidism. Your parathyroid glands can pump out too much parathyroid hormone, which raises calcium levels in your blood and pee. […] Metabolic syndrome. This is a cluster of conditions–including high blood fats, obesity, and high blood pressure–that raise your risk for serious conditions like heart disease and stroke. Metabolic syndrome is also linked to kidney stones. […] Research has found a link between high levels of stress and kidney stones. Scientists think that the chemical changes stress causes in your body increases substances like calcium, oxalate, and uric acid in your pee. It also reduces the volume of pee. All these things can contribute to kidney stones. […] There’s no one cause of kidney stones, which happen when minerals and other substances in your pee cluster together and form hard deposits. But many things can contribute to them, including not drinking enough water; your personal and family history; your diet; and other health conditions you have.
  • #57 Kidney Stones: Causes, Symptoms, and Treatment
    https://www.webmd.com/kidney-stones/kidney-stone-causes
    Kidney stones often have no single cause, and several factors may increase your risk for getting them. […] What you eat can play a big role in whether you get kidney stones. Depending on what kind of kidney stones you’ve had, your doctor may want you to limit foods high in oxalates (like certain nuts and vegetables) or purines (like fatty meats and shellfish). […] Many diseases can play a role in one or more types of kidney stones: […] Certain genetic diseases. One example is medullary sponge kidney, a birth defect that causes cysts to form in your kidneys. […] Type 2 diabetes. It can make your pee more acidic, which encourages stones. […] Gout. This condition makes uric acid build up in your blood and form crystals in your joints and the kidneys. The kidney stones can become large and very painful.
  • #58 What Causes Recurrent Kidney Stones? | UPMC HealthBeat
    https://share.upmc.com/2023/12/recurrent-kidney-stones/
    People who get recurrent kidney stones include those who: […] Have a family history of kidney stones. […] Have frequent kidney or urinary tract infections (UTIs). […] Suffer from chronic dehydration and low urine output. […] Calcium stones, including calcium oxalate and calcium phosphate, are the most common type of kidney stones. Calcium stones account for about 80% of all kidney stones. […] Uric acid kidney stones account for 5% to 10% of all kidney stones. Uric acid crystals don’t dissolve well in acidic urine and form stones. Causes of acidic urine can include obesity, type 2 diabetes, gout, and a diet high in animal protein.
  • #59 Kidney Stones: Causes, Symptoms, and Treatment
    https://www.webmd.com/kidney-stones/kidney-stone-causes
    Kidney stones often have no single cause, and several factors may increase your risk for getting them. […] What you eat can play a big role in whether you get kidney stones. Depending on what kind of kidney stones you’ve had, your doctor may want you to limit foods high in oxalates (like certain nuts and vegetables) or purines (like fatty meats and shellfish). […] Many diseases can play a role in one or more types of kidney stones: […] Certain genetic diseases. One example is medullary sponge kidney, a birth defect that causes cysts to form in your kidneys. […] Type 2 diabetes. It can make your pee more acidic, which encourages stones. […] Gout. This condition makes uric acid build up in your blood and form crystals in your joints and the kidneys. The kidney stones can become large and very painful.
  • #60 Kidney Stones: Causes, Symptoms, and Treatment
    https://www.verywellhealth.com/kidney-stones-5212960
    Risk factors for struvite stones include: Chronic or recurrent UTIs, Dehydration, Diabetes, Neurogenic bladder (dysfunction of the nerves that control the bladder), Urinary catheters (devices that drain urine). […] Risk factors for uric acid stones include: Dehydration, Obesity or type 2 diabetes, A purine-rich diet high in organ meats, alcohol, and certain fish or meats, Gout (a disorder in which crystals are deposited in a joint), Chemotherapy, Taking certain medications, such as diuretics and immune suppressants.
  • #61 Kidney Stones | Types, Causes, Symptoms, Diagnosis & Treatment
    https://www.cincinnatichildrens.org/health/k/kidney-stones
    Some medications may cause low urinary citrate. Urinary citrate, a natural substance in the urine, protects against kidney stone formation. Some types of calcium stones are more likely to form in urine that is low in citrate. […] Hyperparathyroidism can cause too much calcium to be pulled from bones, leading to high calcium in blood and urine. […] Cystinuria is an inherited genetic disorder where there is too much of the amino acid cysteine in the urine that can lead to cysteine stones. […] Hyperoxaluria is where the liver makes too much oxalate, leading to kidney stones made from oxalate. […] Hypercalciuria means the urine has a very high level of calcium. As discussed above, this can be due to various factors such as genetic predisposition, high sodium intake and / or medications.
  • #62 Kidney Stone Causes, First Signs, Symptoms, Treatment, Surgery
    https://www.medicinenet.com/kidney_stones/article.htm
    Hypercalciuria (high calcium in the urine), another inherited condition, causes stones in more than half of the cases. […] Other conditions associated with an increased risk of kidney stones include hyperparathyroidism, kidney diseases such as renal tubular acidosis, and other inherited metabolic conditions, including cystinuria and hyperoxaluria. […] Chronic diseases such as diabetes and high blood pressure (hypertension) are also associated with an increased risk of developing kidney stones. […] Dietary factors and practices may increase the risk of stone formation in susceptible individuals. […] Hyperoxaluria as an inherited condition is uncommon and is known as primary hyperoxaluria. Elevated oxalate levels in the urine increase the risk of stone formation.
  • #63 Kidney Stones | Types, Causes, Symptoms, Diagnosis & Treatment
    https://www.cincinnatichildrens.org/health/k/kidney-stones
    Some medications may cause low urinary citrate. Urinary citrate, a natural substance in the urine, protects against kidney stone formation. Some types of calcium stones are more likely to form in urine that is low in citrate. […] Hyperparathyroidism can cause too much calcium to be pulled from bones, leading to high calcium in blood and urine. […] Cystinuria is an inherited genetic disorder where there is too much of the amino acid cysteine in the urine that can lead to cysteine stones. […] Hyperoxaluria is where the liver makes too much oxalate, leading to kidney stones made from oxalate. […] Hypercalciuria means the urine has a very high level of calcium. As discussed above, this can be due to various factors such as genetic predisposition, high sodium intake and / or medications.
  • #64 Kidney Stones | Types, Causes, Symptoms, Diagnosis & Treatment
    https://www.cincinnatichildrens.org/health/k/kidney-stones
    Some medications may cause low urinary citrate. Urinary citrate, a natural substance in the urine, protects against kidney stone formation. Some types of calcium stones are more likely to form in urine that is low in citrate. […] Hyperparathyroidism can cause too much calcium to be pulled from bones, leading to high calcium in blood and urine. […] Cystinuria is an inherited genetic disorder where there is too much of the amino acid cysteine in the urine that can lead to cysteine stones. […] Hyperoxaluria is where the liver makes too much oxalate, leading to kidney stones made from oxalate. […] Hypercalciuria means the urine has a very high level of calcium. As discussed above, this can be due to various factors such as genetic predisposition, high sodium intake and / or medications.
  • #65 Nephrolithiasis: Practice Essentials, Background, Anatomy
    https://emedicine.medscape.com/article/437096-overview
    A low fluid intake, with a subsequent low volume of urine production, produces high concentrations of stone-forming solutes in the urine. This is an important, if not the most important, environmental factor in kidney stone formation. The exact nature of the tubular damage or dysfunction that leads to stone formation has not been characterized. […] Most research on the etiology and prevention of urinary tract stone disease has been directed toward the role of elevated urinary levels of calcium, oxalate, and uric acid in stone formation, as well as reduced urinary citrate levels. […] Hypercalciuria is the most common metabolic abnormality. Some cases of hypercalciuria are related to increased intestinal absorption of calcium (associated with excess dietary calcium and/or overactive calcium absorption mechanisms), some are related to excess resorption of calcium from bone (ie, hyperparathyroidism), and some are related to an inability of the renal tubules to properly reclaim calcium in the glomerular filtrate (renal-leak hypercalciuria).
  • #66 Causes and Risk Factors
    https://www.mykidneystone.com/en-US/basics/causes-risk-factors.html
    While anyone can get a kidney stone, some people are more at risk. Stones are more common in men than women. Some ethnicities such as non-Hispanic Caucasians are affected at a higher rate. If you are overweight or obese, you are more likely to develop a stone. Diet and lifestyle may play a big role in the cause of your kidney stone as well. […] A kidney stone forms when substances in your urine become highly concentrated which makes fluid intake one of the biggest contributing factors. If you do not drink enough water, you may put yourself at a higher risk for developing a stone. […] Other possible causes include: Exercise (too much or too little), Family or personal history of kidney stones, Food with too much salt or sugar, Infections, Medications, Obesity, Weight-loss surgery. […] You may be at an increased risk to develop a kidney stone if you have: Blockage of your urinary tract, Chronic inflammation of your bowel, Cystic kidney disease Disorder that causes fluid-filled sacs to form on your kidneys, Cystinuria Condition in which your urine contains high levels of the amino acid cystine, Family history of kidney stones, Gout Disorder that causes painful swelling of your joints, History of gastrointestinal tract surgery, Hypercalciuria Genetic condition in which your urine contains high levels of calcium, Hyperoxaluria Condition in which your urine contains high levels of oxalate, Hyperparathyroidism Condition in which the parathyroid glands in your neck release too many hormones, generating extra calcium in your blood, Hyperuricosuria Condition in which your urine contains high levels of uric acid, Renal tubular acidosis Disease in which your kidneys fail to excrete acids into urine, causing your blood to remain too acidic and the urine to be too alkaline.
  • #67 Nephrolithiasis: Practice Essentials, Background, Anatomy
    https://emedicine.medscape.com/article/437096-overview
    A low fluid intake, with a subsequent low volume of urine production, produces high concentrations of stone-forming solutes in the urine. This is an important, if not the most important, environmental factor in kidney stone formation. The exact nature of the tubular damage or dysfunction that leads to stone formation has not been characterized. […] Most research on the etiology and prevention of urinary tract stone disease has been directed toward the role of elevated urinary levels of calcium, oxalate, and uric acid in stone formation, as well as reduced urinary citrate levels. […] Hypercalciuria is the most common metabolic abnormality. Some cases of hypercalciuria are related to increased intestinal absorption of calcium (associated with excess dietary calcium and/or overactive calcium absorption mechanisms), some are related to excess resorption of calcium from bone (ie, hyperparathyroidism), and some are related to an inability of the renal tubules to properly reclaim calcium in the glomerular filtrate (renal-leak hypercalciuria).
  • #68 Hereditary causes of kidney stones – InsightsGenetic kidney stone panelPrimary and secondary hyperoxaluria
    https://news.mayocliniclabs.com/renal/urinary-stone-services/hereditary-causes-of-kidney-stones/
    Secondary hyperoxaluria is an acquired condition that is caused by an increased intake of dietary oxalate or altered intestinal oxalate absorption. With this condition, glycolate, glycerate, and 4-hydroxy-2-oxoglutarate are not increased. When undiagnosed, these disorders can lead to recurrent renal stones, nephrocalcinosis, and often end-stage renal disease. […] To determine the etiology of recurrent calcium oxalate stones.
  • #69 Kidney Stones: Causes, Symptoms, and Treatment
    https://www.verywellhealth.com/kidney-stones-5212960
    Risk factors for calcium oxalate stones include: Dehydration, Obesity, A diet high in animal proteins, sodium, and sugar, A high intake of oxalate-rich foods like spinach, beets, and almonds, Hyperparathyroidism (a hormonal condition that results in too much calcium in the blood), Ulcerative colitis and Crohn’s disease (inflammatory bowel diseases), Inherited conditions like primary hyperoxaluria (the body produces too much oxalate), The overuse of calcium or vitamin C supplements, Gastric bypass surgery. […] Risk factors for calcium phosphate stones include: Dehydration, High sodium intake, Metabolic disorders like renal tubular acidosis (the kidneys are unable to remove enough acid or keep enough base). […] Risk factors for cystine stones include: Cystinuria, Dehydration, High sodium intake, A diet rich in animal proteins.
  • #70 Kidney Stones: Causes, Symptoms, and Treatment
    https://www.verywellhealth.com/kidney-stones-5212960
    Risk factors for calcium oxalate stones include: Dehydration, Obesity, A diet high in animal proteins, sodium, and sugar, A high intake of oxalate-rich foods like spinach, beets, and almonds, Hyperparathyroidism (a hormonal condition that results in too much calcium in the blood), Ulcerative colitis and Crohn’s disease (inflammatory bowel diseases), Inherited conditions like primary hyperoxaluria (the body produces too much oxalate), The overuse of calcium or vitamin C supplements, Gastric bypass surgery. […] Risk factors for calcium phosphate stones include: Dehydration, High sodium intake, Metabolic disorders like renal tubular acidosis (the kidneys are unable to remove enough acid or keep enough base). […] Risk factors for cystine stones include: Cystinuria, Dehydration, High sodium intake, A diet rich in animal proteins.
  • #71 Kidney Stones | Types, Causes, Symptoms, Diagnosis & Treatment
    https://www.cincinnatichildrens.org/health/k/kidney-stones
    High salt in the diet can cause hypercalciuria. […] Some medications can cause hypercalciuria. […] Hypercalciuria is the most common genetic cause of kidney stones. […] Hypocitraturia means there are low levels of citrate in the urine. Low citrate can be related to diet or medicine. […] When citrate is low in the urine, calcium and uric acid kidney stones can form. […] In conditions that cause chronic diarrhea, such as Crohns disease or ulcerative colitis, kidney stones are more likely to form due to excessive fluid loss. […] Some gastrointestinal diseases or surgeries, such as gastric bypass surgery or inflammatory bowel disease, can cause the intestines to absorb more oxalate from foods and form calcium oxalate stones. […] Factors that place a child at increased risk for developing kidney stones are: Family history of stones, Decreased water intake or long periods of dehydration, Repeated urinary tract infection, Diet high in sodium and / or protein, Obesity, Decreased activity level, Defects in the urinary tract, Use of certain medications.
  • #72 Renal Calculi, Nephrolithiasis – StatPearls – NCBI Bookshelf
    https://www.ncbi.nlm.nih.gov/books/NBK442014/
    Low urinary volume due to inadequate fluid intake leads to relative dehydration with increased urinary concentrations and crystal formation. […] Urinary tract infections increase urinary pH in the presence of bacteria that produce urease, predisposing the patient to struvite calculi formation. […] In general, higher total dietary fiber, fruit, and vegetable intake, reduced animal meat protein, and a low sodium diet tend to reduce nephrolithiasis. […] A moderate calcium (dairy) intake is also recommended.
  • #73 Kidney Stones: Causes, symptoms and treatment options | American Kidney Fund
    https://www.kidneyfund.org/all-about-kidneys/other-kidney-problems/kidney-stones
    Some other common causes of too much uric acid in your urine include type 2 diabetes, obesity, and metabolic syndrome. […] Struvite stones, also known as „infection stones,” are less common than calcium and uric stones. In the United States, 5% to 15% of all stones are struvite stones. These stones form from the effect of urease, a chemical produced by bacteria that cause urinary tract infections (UTIs). […] Cystine stones are caused by a rare condition called cystinuria that is passed down in families. […] They account for 1 out of 10 adult kidney stones and about 7 out of 10 pediatric kidney stones. […] Cystinuria causes a natural chemical called cystine to leak into your urine. […] Anyone can get a kidney stone, but some people are more likely than others to get them. […] Some rare genetic diseases may cause kidney stones (such as primary hyperoxaluria(PH1) and cystinuria). […] You may be more likely to get a kidney stone if you: […] Have a health problem that causes your urine (pee) to contain high levels of cystine, oxalate, uric acid or calcium. […] Certain medicines may be prescribed to help prevent kidney stones.
  • #74 Causes – Kidney Stone Melbourne
    https://kidneystonemelbourne.com.au/causes/
    It is important to understand that these chemical variations in urine are not usually related to dietary intake but are simply a reflection of genetic variation. […] Most kidney stones in Australia are Calcium stones, either Calcium Oxalate or Calcium Phosphate. Calcium stones account for over 90% of stones and are usually idiopathic not caused by a specific disease process. […] There are a wide range of causes of Renal Stone Disease: Idiopathic. Hypercalcaemia. Uric acid pathology. Gastrointestinal IBD, Bariatric Surgery. UTIs. […] Nephrocalcinosis. Sarcoidosis. Cystinuria (type A, B, AB). Primary hyperoxaluria (PH). Renal tubular acidosis (RTA). Type I, 2,8-dihydroxyadenine. Xanthinuria. Lesch-Nyhan syndrome. […] Cystic fibrosis. Medullary sponge kidney (tubular ectasia). Ureteropelvic junction (PUJ) obstruction. Calyceal diverticulum. Calyceal cyst. Ureteric stricture. Horseshoe kidney. Ureterocoele. Foreign body in the kidney e.g. retained stent. […] Anhydrase inhibitors. Calcium supplements. Vitamin C or D. Probenecid. Triamterene, chemotherapy.
  • #75 Causes – Kidney Stone Melbourne
    https://kidneystonemelbourne.com.au/causes/
    It is important to understand that these chemical variations in urine are not usually related to dietary intake but are simply a reflection of genetic variation. […] Most kidney stones in Australia are Calcium stones, either Calcium Oxalate or Calcium Phosphate. Calcium stones account for over 90% of stones and are usually idiopathic not caused by a specific disease process. […] There are a wide range of causes of Renal Stone Disease: Idiopathic. Hypercalcaemia. Uric acid pathology. Gastrointestinal IBD, Bariatric Surgery. UTIs. […] Nephrocalcinosis. Sarcoidosis. Cystinuria (type A, B, AB). Primary hyperoxaluria (PH). Renal tubular acidosis (RTA). Type I, 2,8-dihydroxyadenine. Xanthinuria. Lesch-Nyhan syndrome. […] Cystic fibrosis. Medullary sponge kidney (tubular ectasia). Ureteropelvic junction (PUJ) obstruction. Calyceal diverticulum. Calyceal cyst. Ureteric stricture. Horseshoe kidney. Ureterocoele. Foreign body in the kidney e.g. retained stent. […] Anhydrase inhibitors. Calcium supplements. Vitamin C or D. Probenecid. Triamterene, chemotherapy.
  • #76 Causes – Kidney Stone Melbourne
    https://kidneystonemelbourne.com.au/causes/
    It is important to understand that these chemical variations in urine are not usually related to dietary intake but are simply a reflection of genetic variation. […] Most kidney stones in Australia are Calcium stones, either Calcium Oxalate or Calcium Phosphate. Calcium stones account for over 90% of stones and are usually idiopathic not caused by a specific disease process. […] There are a wide range of causes of Renal Stone Disease: Idiopathic. Hypercalcaemia. Uric acid pathology. Gastrointestinal IBD, Bariatric Surgery. UTIs. […] Nephrocalcinosis. Sarcoidosis. Cystinuria (type A, B, AB). Primary hyperoxaluria (PH). Renal tubular acidosis (RTA). Type I, 2,8-dihydroxyadenine. Xanthinuria. Lesch-Nyhan syndrome. […] Cystic fibrosis. Medullary sponge kidney (tubular ectasia). Ureteropelvic junction (PUJ) obstruction. Calyceal diverticulum. Calyceal cyst. Ureteric stricture. Horseshoe kidney. Ureterocoele. Foreign body in the kidney e.g. retained stent. […] Anhydrase inhibitors. Calcium supplements. Vitamin C or D. Probenecid. Triamterene, chemotherapy.
  • #77 Renal Calculi, Nephrolithiasis – StatPearls – NCBI Bookshelf
    https://www.ncbi.nlm.nih.gov/books/NBK442014/
    Many drugs are known to cause renal stones, including the following: Atazanavir, Guaifenesin, Indinavir, Silicate overuse, Sulfonamide, Triamterene. […] There also appears to be a genetic association with the production of renal calculi. […] Nephrolithiasis risk factors include the following: A positive family history of urolithiasis increases the incidence of new stone formation 2.5-fold. […] A prior personal history of urolithiasis increases the risk of new renal stones by 15% during the first year and an average of 50% over the following 10 years. […] Diabetes, hypertension, gout, male sex, metabolic syndrome, and obesity appear to increase the risk of urolithiasis. […] Increased urinary acidity (pH 5) promotes uric acid stone formation. […] Increased oxalate absorption (from malabsorption syndromes, gastro bypass surgery, and similar) can greatly increase urinary oxalate levels and calcium oxalate stone production.
  • #78 What Could be Causing Your Recurrent Kidney Stones?: Urology Associates Medical Group: Urologists
    https://www.urologymedicalgroup.com/blog/what-could-be-causing-your-recurrent-kidney-stones
    But for some people, certain hereditary or genetic conditions may cause recurrent stones. These include: Cystinuria, a condition that elevates the levels of cystine in your urine, an amino acid that can crystalize and form stones; Primary hyperoxaluria, a group of genetic disorders that cause your liver to produce too much oxalate, which can crystalize and form stones; Cystic fibrosis, a condition linked to an increase in oxalate and a decrease in the chemical needed to break down oxalate; GI conditions that trigger chronic diarrhea, such as Crohns disease, inflammatory bowel disorder, hyperparathyroidism, gout, diabetes, gastric bypass, and obesity.
  • #79 Kidney Stones: Causes, Symptoms, and Treatment
    https://www.webmd.com/kidney-stones/kidney-stone-causes
    Hyperparathyroidism. Your parathyroid glands can pump out too much parathyroid hormone, which raises calcium levels in your blood and pee. […] Metabolic syndrome. This is a cluster of conditions–including high blood fats, obesity, and high blood pressure–that raise your risk for serious conditions like heart disease and stroke. Metabolic syndrome is also linked to kidney stones. […] Research has found a link between high levels of stress and kidney stones. Scientists think that the chemical changes stress causes in your body increases substances like calcium, oxalate, and uric acid in your pee. It also reduces the volume of pee. All these things can contribute to kidney stones. […] There’s no one cause of kidney stones, which happen when minerals and other substances in your pee cluster together and form hard deposits. But many things can contribute to them, including not drinking enough water; your personal and family history; your diet; and other health conditions you have.
  • #80 Kidney stones Information | Mount Sinai – New York
    https://www.mountsinai.org/health-library/report/kidney-stones
    Kidney stones are hard, solid particles that form in the urinary tract. […] The key process in the development of kidney stones is supersaturation. […] Different factors may reduce the volume of urine, or increase the amount of stone-forming chemicals. […] Not having enough of these protective substances can cause stones. […] Changes in the acid balance of the urine can affect stone formation. […] Often, the cause of calcium stones is not known and is referred to as idiopathic (of unknown cause) nephrolithiasis. […] Hypercalciuria is a condition in which there is too much calcium in the urine. It is responsible for as many as 70% of calcium-containing stones. […] Oxalate is the most common stone-forming compound. Too much oxalate in the urine is responsible for up to 60% of calcium stones and is a more common cause of stones than excess calcium in the urine.
  • #81 Nephrolithiasis: Practice Essentials, Background, Anatomy
    https://emedicine.medscape.com/article/437096-overview
    A low fluid intake, with a subsequent low volume of urine production, produces high concentrations of stone-forming solutes in the urine. This is an important, if not the most important, environmental factor in kidney stone formation. The exact nature of the tubular damage or dysfunction that leads to stone formation has not been characterized. […] Most research on the etiology and prevention of urinary tract stone disease has been directed toward the role of elevated urinary levels of calcium, oxalate, and uric acid in stone formation, as well as reduced urinary citrate levels. […] Hypercalciuria is the most common metabolic abnormality. Some cases of hypercalciuria are related to increased intestinal absorption of calcium (associated with excess dietary calcium and/or overactive calcium absorption mechanisms), some are related to excess resorption of calcium from bone (ie, hyperparathyroidism), and some are related to an inability of the renal tubules to properly reclaim calcium in the glomerular filtrate (renal-leak hypercalciuria).
  • #82 Kidney stones Information | Mount Sinai – New York
    https://www.mountsinai.org/health-library/report/kidney-stones
    Kidney stones are hard, solid particles that form in the urinary tract. […] The key process in the development of kidney stones is supersaturation. […] Different factors may reduce the volume of urine, or increase the amount of stone-forming chemicals. […] Not having enough of these protective substances can cause stones. […] Changes in the acid balance of the urine can affect stone formation. […] Often, the cause of calcium stones is not known and is referred to as idiopathic (of unknown cause) nephrolithiasis. […] Hypercalciuria is a condition in which there is too much calcium in the urine. It is responsible for as many as 70% of calcium-containing stones. […] Oxalate is the most common stone-forming compound. Too much oxalate in the urine is responsible for up to 60% of calcium stones and is a more common cause of stones than excess calcium in the urine.
  • #83 Hereditary causes of kidney stones – InsightsGenetic kidney stone panelPrimary and secondary hyperoxaluria
    https://news.mayocliniclabs.com/renal/urinary-stone-services/hereditary-causes-of-kidney-stones/
    Secondary hyperoxaluria is an acquired condition that is caused by an increased intake of dietary oxalate or altered intestinal oxalate absorption. With this condition, glycolate, glycerate, and 4-hydroxy-2-oxoglutarate are not increased. When undiagnosed, these disorders can lead to recurrent renal stones, nephrocalcinosis, and often end-stage renal disease. […] To determine the etiology of recurrent calcium oxalate stones.
  • #84 Kidney stones Information | Mount Sinai – New York
    https://www.mountsinai.org/health-library/report/kidney-stones
    Excess uric acid in the urine occurs in 15% to 20% of people (mostly men) with calcium oxalate stones. […] Struvite stones are almost always caused by urinary tract infections. […] Cystine stones develop from genetic defects that cause the abnormal transport of amino acids in the kidney and gastrointestinal system, leading to a buildup of cystine. […] In some cases, xanthine stones may develop in people being treated with allopurinol for gout.
  • #85 Kidney Stones – Symptoms, Causes, Prevention and Treatment PACE Hospitals – Best Hospitals in Hitech City, Hyderabad, India | Near Madhapur, Kukatpally, KPHB, Kondapur, Gachibowli, Jubilee Hills, Banjara HillsPACE Hospitals Contact Number
    https://www.pacehospital.com/kidney-stone-cause-symptom-treatment
    Inadequate hydration and insufficient urine volume are the leading causes of kidney stone disease. The four most frequent chemical factors that contribute to kidney stone production are: Hypercalciuria – an excess amount of calcium in the urine, Hyperoxaluria – increased oxalate in the urine, Hyperuricosuria- the excretion of more than 800 mg of uric acid per day in men and more than 750 mg in women through their urine, Hypocitraturia- excretion of less than 320 mg of citrate in the urine per day. […] The major causes of all four types of kidney stones include: Calcium stones may develop due to Hyperparathyroidism (excess release of parathyroid hormone by parathyroid gland), Renal calcium leak (a condition in which the kidneys lose calcium in the urine independent of calcium levels in the blood or diet), Idiopathic hypercalciuria (elevated calcium in the urine due to an unknown reason), Hypomagnesemia (magnesium deficiency).
  • #86 Kidney Stones – Symptoms, Causes, Prevention and Treatment PACE Hospitals – Best Hospitals in Hitech City, Hyderabad, India | Near Madhapur, Kukatpally, KPHB, Kondapur, Gachibowli, Jubilee Hills, Banjara HillsPACE Hospitals Contact Number
    https://www.pacehospital.com/kidney-stone-cause-symptom-treatment
    Inadequate hydration and insufficient urine volume are the leading causes of kidney stone disease. The four most frequent chemical factors that contribute to kidney stone production are: Hypercalciuria – an excess amount of calcium in the urine, Hyperoxaluria – increased oxalate in the urine, Hyperuricosuria- the excretion of more than 800 mg of uric acid per day in men and more than 750 mg in women through their urine, Hypocitraturia- excretion of less than 320 mg of citrate in the urine per day. […] The major causes of all four types of kidney stones include: Calcium stones may develop due to Hyperparathyroidism (excess release of parathyroid hormone by parathyroid gland), Renal calcium leak (a condition in which the kidneys lose calcium in the urine independent of calcium levels in the blood or diet), Idiopathic hypercalciuria (elevated calcium in the urine due to an unknown reason), Hypomagnesemia (magnesium deficiency).
  • #87 What Causes Kidney Stones? – StoneDisease.org
    https://stonedisease.org/for-patients/what-causes-kidney-stones/
    Inadequate fluid consumption also promotes stone disease because it leads to higher concentration of salts in the kidney. Dehydration is strongly linked to kidney stones. […] When the urine has low levels of inhibitors, kidney stones are more likely to develop. One of the most important inhibitors of kidney stones is citrate.
  • #88 Nephrolithiasis: Practice Essentials, Background, Anatomy
    https://emedicine.medscape.com/article/437096-overview
    Magnesium and especially citrate are important inhibitors of stone formation in the urinary tract. Decreased levels of these in the urine predispose to stone formation. […] The following are the four main chemical types of renal calculi, which together are associated with more than 20 underlying etiologies: Calcium stones, Struvite (magnesium ammonium phosphate) stones, Uric acid stones, Cystine stones. […] Stone analysis, together with serum and 24-hour urine metabolic evaluation, can identify an etiology in more than 95% of patients. Specific therapy can result in a remission rate of more than 80% and can decrease the individual recurrence rate by 90%. Therefore, emergency physicians should stress the importance of urologic follow-up, especially in patients with recurrent stones, solitary kidneys, or previous kidney or stone surgery and in all children.
  • #89 Renal Calculi, Nephrolithiasis – StatPearls – NCBI Bookshelf
    https://www.ncbi.nlm.nih.gov/books/NBK442014/
    Many drugs are known to cause renal stones, including the following: Atazanavir, Guaifenesin, Indinavir, Silicate overuse, Sulfonamide, Triamterene. […] There also appears to be a genetic association with the production of renal calculi. […] Nephrolithiasis risk factors include the following: A positive family history of urolithiasis increases the incidence of new stone formation 2.5-fold. […] A prior personal history of urolithiasis increases the risk of new renal stones by 15% during the first year and an average of 50% over the following 10 years. […] Diabetes, hypertension, gout, male sex, metabolic syndrome, and obesity appear to increase the risk of urolithiasis. […] Increased urinary acidity (pH 5) promotes uric acid stone formation. […] Increased oxalate absorption (from malabsorption syndromes, gastro bypass surgery, and similar) can greatly increase urinary oxalate levels and calcium oxalate stone production.
  • #90 Kidney Stones – Symptoms, Causes, Prevention and Treatment PACE Hospitals – Best Hospitals in Hitech City, Hyderabad, India | Near Madhapur, Kukatpally, KPHB, Kondapur, Gachibowli, Jubilee Hills, Banjara HillsPACE Hospitals Contact Number
    https://www.pacehospital.com/kidney-stone-cause-symptom-treatment
    Inadequate hydration and insufficient urine volume are the leading causes of kidney stone disease. The four most frequent chemical factors that contribute to kidney stone production are: Hypercalciuria – an excess amount of calcium in the urine, Hyperoxaluria – increased oxalate in the urine, Hyperuricosuria- the excretion of more than 800 mg of uric acid per day in men and more than 750 mg in women through their urine, Hypocitraturia- excretion of less than 320 mg of citrate in the urine per day. […] The major causes of all four types of kidney stones include: Calcium stones may develop due to Hyperparathyroidism (excess release of parathyroid hormone by parathyroid gland), Renal calcium leak (a condition in which the kidneys lose calcium in the urine independent of calcium levels in the blood or diet), Idiopathic hypercalciuria (elevated calcium in the urine due to an unknown reason), Hypomagnesemia (magnesium deficiency).
  • #91 Renal Calculi, Nephrolithiasis – StatPearls – NCBI Bookshelf
    https://www.ncbi.nlm.nih.gov/books/NBK442014/
    Low urinary volume due to inadequate fluid intake leads to relative dehydration with increased urinary concentrations and crystal formation. […] Urinary tract infections increase urinary pH in the presence of bacteria that produce urease, predisposing the patient to struvite calculi formation. […] In general, higher total dietary fiber, fruit, and vegetable intake, reduced animal meat protein, and a low sodium diet tend to reduce nephrolithiasis. […] A moderate calcium (dairy) intake is also recommended.
  • #92 Renal Calculi, Nephrolithiasis – StatPearls – NCBI Bookshelf
    https://www.ncbi.nlm.nih.gov/books/NBK442014/
    Low urinary volume due to inadequate fluid intake leads to relative dehydration with increased urinary concentrations and crystal formation. […] Urinary tract infections increase urinary pH in the presence of bacteria that produce urease, predisposing the patient to struvite calculi formation. […] In general, higher total dietary fiber, fruit, and vegetable intake, reduced animal meat protein, and a low sodium diet tend to reduce nephrolithiasis. […] A moderate calcium (dairy) intake is also recommended.
  • #93 Kidney stones – Symptoms and causes – Mayo Clinic
    https://www.mayoclinic.org/diseases-conditions/kidney-stones/symptoms-causes/syc-20355755
    Kidney stones are hard objects made of minerals and salts in urine. They form inside the kidneys. […] Kidney stones have various causes. These include diet, extra body weight, some health conditions, and some supplements and medicines. Kidney stones can affect any of the organs that make urine or remove it from the body from the kidneys to the bladder. Often, stones form when the urine has less water in it. This lets minerals form crystals and stick together. […] Kidney stones develop when the urine contains more crystal-forming substances than the fluid in the urine can dilute. These substances include calcium oxalate, calcium phosphate and uric acid. At the same time, the urine may lack substances that prevent crystals from sticking together. That creates an ideal setting for kidney stones to form.
  • #94 Kidney stones Information | Mount Sinai – New York
    https://www.mountsinai.org/health-library/report/kidney-stones
    Kidney stones are hard, solid particles that form in the urinary tract. […] The key process in the development of kidney stones is supersaturation. […] Different factors may reduce the volume of urine, or increase the amount of stone-forming chemicals. […] Not having enough of these protective substances can cause stones. […] Changes in the acid balance of the urine can affect stone formation. […] Often, the cause of calcium stones is not known and is referred to as idiopathic (of unknown cause) nephrolithiasis. […] Hypercalciuria is a condition in which there is too much calcium in the urine. It is responsible for as many as 70% of calcium-containing stones. […] Oxalate is the most common stone-forming compound. Too much oxalate in the urine is responsible for up to 60% of calcium stones and is a more common cause of stones than excess calcium in the urine.
  • #95 Kidney stones – symptoms, diagnosis and treatment | healthdirect
    https://www.healthdirect.gov.au/kidney-stones
    Kidney stones are hard clumps of crystals that form in your kidneys. […] Urine contains many waste chemicals which can clump together into hard crystals. These hard crystals are kidney stones. They can range in size from as small as a grain of sand to as big as a golf ball. […] There are many types of kidney stones. They can be made from: calcium oxalate, calcium phosphate, uric acid, cystine. […] Youre more likely to get kidney stones if: youve had one before, they run in your family (you may have inherited genes that increase your chance), you are male, you are often dehydrated, you take certain medicines, you eat foods that are high in salt, you have certain health conditions like gout, urinary tract infections, inflammatory bowel disease, some cancers, a rare genetic metabolic condition. […] You may not find out what caused your kidney stones.
  • #96 Nephrolithiasis: Practice Essentials, Background, Anatomy
    https://emedicine.medscape.com/article/437096-overview
    Magnesium and especially citrate are important inhibitors of stone formation in the urinary tract. Decreased levels of these in the urine predispose to stone formation. […] The following are the four main chemical types of renal calculi, which together are associated with more than 20 underlying etiologies: Calcium stones, Struvite (magnesium ammonium phosphate) stones, Uric acid stones, Cystine stones. […] Stone analysis, together with serum and 24-hour urine metabolic evaluation, can identify an etiology in more than 95% of patients. Specific therapy can result in a remission rate of more than 80% and can decrease the individual recurrence rate by 90%. Therefore, emergency physicians should stress the importance of urologic follow-up, especially in patients with recurrent stones, solitary kidneys, or previous kidney or stone surgery and in all children.
  • #97 Recurrent Nephrolithiasis in Adults: A Comparative Effectiveness Review of Preventive Medical Strategies | Effective Health Care (EHC) Program
    https://effectivehealthcare.ahrq.gov/products/kidney-stone-prevention/research-protocol
    Dietary interventions are designed primarily to alter the concentration of one or more crystal-forming and/or crystal-inhibiting substances in the urine. […] Previous systematic reviews of RCTs of pharmacological therapies have reported that although thiazide diuretics and citrate therapy reduce stone recurrence, evidence was insufficient for the efficacy of other pharmacological treatments. […] There is significant variation in current medical practice regarding management to prevent recurrent nephrolithiasis. Clinical uncertainty exists regarding the effectiveness, comparative effectiveness, and adverse effects of different dietary and pharmacological preventive treatments; the value of urine and blood biochemical measures for initiating and/or modifying treatment; and the potential impact of patient and stone characteristics on important treatment outcomes.