Materiały źródłowe

• #1 Swollen Lymph Nodes (Lymphadenopathy/Adenopathy): Symptoms & Causes

  https://my.clevelandclinic.org/health/symptoms/15219-swollen-lymph-nodes

  Swollen lymph nodes are your bodys natural reactions to illness or infection. Lymphadenopathy is common and actually a good thing. The swelling in these pea- or bean-sized lymph nodes are one of your bodys natural reactions to illness or infection. Swollen lymph nodes mean your bodys immune system is working to clear away infection and/or invading viruses or bacteria. […] Your lymph nodes get larger when more blood cells come to fight off an invading infection. They all essentially pile in, causing pressure and swelling. […] Generalized swollen lymph nodes mean you have them in two or more areas of your body. This usually points to a more serious systemic (meaning its all over your body) disease. These conditions will require more aggressive treatments over a longer period of time. Your swollen lymph nodes may not return to their normal size until after your treatment has ended. […] In rare situations, swollen lymph nodes can point to cancer specifically, lymphoma (cancer of the lymphatic system). Other less common causes of swollen lymph nodes include injury, AIDS and cancer that’s spread from the lymph nodes to another part of your body.

• #1 Adenopathy – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK558918/

  Lymphadenopathy refers to the swelling of lymph nodes which can be secondary to bacterial, viral, or fungal infections, autoimmune disease, and malignancy. […] Lymph nodes are a part of the reticuloendothelial system, which includes monocytes of the blood, macrophages of the connective tissue, thymus, spleen, bone marrow, bone, mucosa-associated lymphoid tissue of visceral organs, lymphatic vessels, and lymphatic fluid found in interstitial fluid. […] Lymphatic fluid moves throughout the lymphatic system, transitioning from the organs to lymphoid capillaries, lymphatic vessels, and finally lymph nodes for foreign antigen filtration. Foreign substances are presented to the lymphoid cells, which lead to cellular proliferation and enlargement. Under microscopy, cellular proliferation in lymphoid follicles may be identified as several mitotic figures.

• #1 Lymphadenopathy pathophysiology – wikidoc

  https://www.wikidoc.org/index.php/Lymphadenopathy_pathophysiology

  Lymph nodes are part of the immune system. As such, they are most readily palpable when fighting infections. Infections can either originate from the organs that they drain or primarily within the lymph node itself, referred to as lymphadenitis. […] The pathogenesis of lymphadenopathy is characterized by the inflammation of lymph nodes. This process is primarily due to an elevated rate of trafficking of lymphocytes into the node from the blood, exceeding the rate of outflow from the node. […] The immune response between the antigen and lymphocyte that leads to cellular proliferation and enlargement of the lymph nodes. […] Lymph nodes may also be enlarged secondarily as a result of the activation and proliferation of antigen-specific T and B cells (clonal expansion). […] Lymphatic fluid moves throughout the lymphatic system and enters lymph nodes for filtration of foreign antigen. Foreign antigens are presented to the lymphoid cells, which lead to cellular proliferation and enlargement. Under microscopy, cellular proliferation in lymphoid follicles may be identified as several mitotic figures.

• #1 Lymphadenitis: Practice Essentials, Pathophysiology, Etiology

  https://emedicine.medscape.com/article/960858-overview

  Increased lymph node size may be caused by the following: […] Multiplication of cells within the node, including lymphocytes, plasma cells, monocytes, or histiocytes […] Infiltration of cells from outside the node, such as malignant cells or neutrophils […] Draining of an infection (eg, abscess) into local lymph nodes.

• #1 Lymphadenopathy pathophysiology – wikidoc

  https://www.wikidoc.org/index.php/Lymphadenopathy_pathophysiology

  Increased activity leads to stretching of the lymphatic capsule and this may cause localized tenderness. […] Lymph nodes follicle necrosis may occur due to inflammatory, infectious, or malignant conditions. The neutrophil-rich infiltrates suggests bacterial infection, while lymphocyte-rich predominance may suggest viral infection. However, clinicians must remember that etiologies may vary; lymphomas, leukemias, tuberculosis, or even systemic lupus erythematosus (SLE) may be more appropriate diagnoses in the appropriate clinical context.

• #1 Multitier mechanics control stromal adaptations in the swelling lymph node | Nature Immunology

  https://www.nature.com/articles/s41590-022-01257-4

  Lymph nodes (LNs) comprise two main structural elements: fibroblastic reticular cells that form dedicated niches for immune cell interaction and capsular fibroblasts that build a shell around the organ. Immunological challenge causes LNs to increase more than tenfold in size within a few days. Here, we characterized the biomechanics of LN swelling on the cellular and organ scale. We identified lymphocyte trapping by influx and proliferation as drivers of an outward pressure force, causing fibroblastic reticular cells of the T-zone (TRCs) and their associated conduits to stretch. After an initial phase of relaxation, TRCs sensed the resulting strain through cell matrix adhesions, which coordinated local growth and remodeling of the stromal network. While the expanded TRC network readopted its typical configuration, a massive fibrotic reaction of the organ capsule set in and countered further organ expansion. Thus, different fibroblast populations mechanically control LN swelling in a multitier fashion.

• #1 Multitier mechanics control stromal adaptations in the swelling lymph node | Nature Immunology

  https://www.nature.com/articles/s41590-022-01257-4

  Upon immunological challenge, reactive LNs swell rapidly by recruiting large numbers of nave lymphocytes via high endothelial venules (HEVs), while lymphocyte egress via efferent lymphatics is initially blocked. LNs can swell up to tenfold in size in the order of days, imposing a structural problem on the stromal network that has to cope with this volumetric challenge. TRCs are able to relax and expand upon interaction with activated DCs, potentially creating additional space during the swelling phase. […] Here we investigated the cellular and mechanical changes accompanying LN swelling and show that mechanical load on the conduit network and subsequent TRC mechanosensing are central to expansion of the TRC network and LN growth. […] We next asked what are the internal forces driving organ expansion. Increased entry, blocked exit and proliferation of lymphocytes are the main factors that increase cellularity within the densely packed node.

• #1 Swollen lymph nodes – Symptoms & causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/swollen-lymph-nodes/symptoms-causes/syc-20353902

  Swollen lymph nodes most often happen because of infection from bacteria or viruses. Rarely, cancer causes swollen lymph nodes. […] The lymph nodes, also called lymph glands, play a vital role in the body being able to fight off infections. They work as filters, trapping viruses, bacteria and other causes of illnesses before they can infect other parts of the body. […] Lymph nodes are small, round or bean-shaped bunches of cells. Inside lymph nodes are a mix of types of immune system cells. These cells filter the lymph fluid as it goes through the body and protect the body from invaders. […] The most common cause of swollen lymph nodes is an infection, usually viral, such as the common cold. Sometimes the cause isn’t found. […] Other causes of swollen lymph nodes include: […] Lymphoma. This cancer starts in the lymph system. […] When an infection that causes swollen lymph nodes isn’t treated, a collection of pus may form. These are called abscesses. Pus contains fluid, white blood cells, dead tissue, and bacteria or other invaders. An abscess might need to be drained and treated with an antibiotic.

• #1 Lymph Nodes and Glands: Location, Function, Common Problems

  https://www.webmd.com/a-to-z-guides/what-are-lymph-nodes

  Your lymph nodes usually swell because your body is fighting off an infection. It’s a sign that more lymphocytes are in action than usual, trying to kill off germs. […] Any infection can make your lymph nodes swell, including: […] Usually, your swollen lymph nodes are close to where your infection is. […] If your lymph nodes feel hard, don’t move around under your skin, and they are getting big very fast, it can be a sign of cancer.

• #1 Swollen lymph nodes: MedlinePlus Medical EncyclopediaLock

  https://medlineplus.gov/ency/article/003097.htm

  Lymph nodes are present throughout your body. They are an important part of your immune system. Lymph nodes help your body recognize and fight germs, infections, and other foreign substances. […] The term „swollen glands” refers to enlargement of one or more lymph nodes. The medical name for swollen lymph nodes is lymphadenopathy. […] Infections are the most common cause of swollen lymph nodes. Infections that can cause them include: […] Immune or autoimmune disorders that can cause swollen lymph nodes are: […] Cancers that can cause swollen lymph nodes include: […] Which lymph nodes are swollen depends on the cause and the body parts involved. Swollen lymph nodes that appear suddenly and are painful are usually due to injury or infection. Slow, painless swelling may be due to cancer or a tumor. […] Treatment depends on the cause of the swollen nodes.

• #1 Swollen Lymph Node Symptoms and Causes

  https://www.verywellhealth.com/cervical-lymph-nodes-2252142

  Swollen lymph nodes in your neck, armpit, head, and other parts of the body often occur when your body is fighting an infection or disease. Lymph nodes filter fluids from the lymphatic system. If the immune system recognizes something harmful in the lymph node, it will trigger an immune response and inflammation that causes the lymph nodes to swell. […] The swelling of lymph nodes is most commonly caused by inflammation, referred to as lymphadenitis. This is usually due to an infection somewhere in the body. […] Certain infections can lead to the formation of a lymph node abscess, particularly those that are severe or prolonged. Abscesses are inflamed and often painful pockets of pus that may require drainage and antibiotic drugs to clear them. […] Swollen lymph nodes are common with certain autoimmune disorders. These are diseases in which the immune system mistakenly attacks normal tissues with inflammation.

• #1 Lymph Nodes: Function and Signs of Disease

  https://www.verywellhealth.com/understanding-the-purpose-of-lymph-nodes-2249122

  Lymphadenopathy can occur with any cancer as cancer cells break off and get trapped by nearby lymph nodes. […] Most escaped cancer cells are killed in the lymph nodes before they can start growing elsewhere. But sometimes the lymph nodes are unable to contain the cells and are overtaken by cancer. […] Autoimmune diseases are those in which the immune system mistakenly attacks normal cells and tissues. In some cases, the immune assault directly targets lymph nodes. […] Another disease thought to involve autoimmunity, called sarcoidosis, can also cause swollen lymph glands. […] Certain medications can also cause lymphadenopathy either by triggering an immune response or an allergic or inflammatory reaction. […] COVID-19 vaccine has also been known to induce lymphadenopathy, typically in the armpit nearest the injection site.

• #1 Swollen Lymph Node Symptoms and Causes

  https://www.verywellhealth.com/cervical-lymph-nodes-2252142

  Autoimmune lymphadenopathy can be difficult to distinguish from infectious lymphadenopathy and may only be identified after early testing fails to uncover an infectious cause. […] Certain medications can also cause swollen lymph nodes. In such cases, lymphadenopathy can be reversed if the drug can be stopped or substituted. […] Swollen lymph nodes are rarely a sign of cancer. However, painless swelling of one or more lymph nodes is a sign that your condition is not infectious and warrants immediate investigation. […] The diagnosis of lymphadenopathy may involve a physical exam, imaging studies, lab tests, and a lymph node biopsy. The treatment varies by the cause, but the pain and swelling can usually be relieved with a cold compress or an over-the-counter painkiller like Advil.

• #1 Lymphadenopathy (Swollen Lymph Glands)

  https://www.cancercenter.com/integrative-care/lymphadenopathy

  If youve ever felt swollen lumps in your neck when youve had a respiratory infection or a sore throat, youve experienced lymphadenopathyswollen lymph glands. […] These glands also may swell when cancer cells from a tumor move to them. If youve been diagnosed with cancer, your doctor may wish to biopsy lymph nodes near your tumor to see whether any cancer cells have migrated there. If cancer cells are found, it could indicate they may be spreading through your blood and causing secondary tumors (metastasis) elsewhere in your body. […] This system plays an important part in fighting infection and disease by filtering out bacteria, viruses, cancer cells and foreign material and attacking them in the lymph nodes. […] Some cancer-related lymphadenopathy cases start with cells that travel from a tumor to one or more lymph nodes. But cancer also may originate in the lymph nodes.

• #1 Swollen Lymph Glands: Causes and Treatment

  https://patient.info/signs-symptoms/neck-lumps-and-bumps-leaflet/swollen-lymph-glands

  Lymph glands are joined together by a network of lymph channels. Lymph is a fluid that forms between the cells of the body. This watery fluid travels in the lymph channels, through various lymph glands, and eventually drains into the bloodstream. […] The lymph glands near to an infection swell quickly and become tender as the immune system 'fights off’ infecting germs (bacteria, viruses, etc). The lymph glands usually go back to their normal pea size when the infection is over. It can take a week or so for them gradually to go back to normal after the infection. Tender, swollen lymph glands are usually a sign that your body is fighting off an infection. […] Some cells from a cancer can break off and spread (metastasise) to nearby lymph glands via the lymph channels. These cancer cells then grow and multiply in the lymph glands and cause the glands to swell.

• #1 Swollen Lymph Glands: Causes and Treatment

  https://patient.info/signs-symptoms/neck-lumps-and-bumps-leaflet/swollen-lymph-glands

  As a rule, swollen lymph glands due to cancers, lymphomas and leukaemias develop more slowly than those due to infections. They also tend to be painless at first. […] The treatment depends on the cause. Swollen lymph glands are like a marker of various conditions, all with different outlooks and treatments. So, for example, the common cause is due to a viral infection. In this case, no treatment is needed: the lymph glands will go back to normal after a week or so. However, swollen lymph glands caused by a cancer, lymphoma or leukaemia may need extensive treatment of the underlying problem.

• #1 Swollen Lymph Nodes – Heart and Blood Vessel Disorders – Merck Manual Consumer Version

  https://www.merckmanuals.com/home/heart-and-blood-vessel-disorders/lymphatic-disorders/swollen-lymph-nodes

  The most dangerous causes of swollen lymph nodes are cancer, human immunodeficiency virus (HIV) infection, and tuberculosis (TB). […] Nodes that are hard, very enlarged, have been present for longer times (such as several weeks), and do not move when pushed may indicate cancer. Tenderness, discoloration, and warmth in and around a single enlarged lymph node may indicate an infection of the node. […] If doctors suspect cancer or lymphoma, the person has a lymph node biopsy. Biopsy may also be needed when widespread lymph node swelling does not resolve within 3 to 4 weeks.

• #1 Swollen lymph node– DO NOT STRESS – Introduce yourself – Cancer Chat | Cancer Research UK

  https://cancerchat.cancerresearchuk.org/f/introduce-yourself/92988/swollen-lymph-node—do-not-stress

  I had one swollen lymph node on the left side of my neck for around 3 months with no other symptoms. […] I think my swollen lymph node was caused by allergies and a lack of sleep, but who knows and who cares!!! […] I was so happy when the consultant told me it was a healthy throat and thyroid and was amazed when he said it can be caused by stress. […] I wasn’t sure whether lymph nodes could swell due to anxiety and stress but you’ve just clarified it for me and for that I’m grateful!

• #1 Lymphadenopathy – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK513250/

  Lymphadenopathy, or adenopathy, is a common abnormal finding during the physical exam in general medical practice. It can be caused by neoplasm, inflammatory conditions, or infection. […] A clear understanding of lymph node function, location, description, and the etiologies of their enlargement is important in clinical decisions regarding which cases need rapid and aggressive workup and which need only be observed. […] The lymph node functions as an antigen filter for the body’s reticuloendothelial system. It consists of a multi-layered sinus that sequentially exposes B-cell lymphocytes, T-cell lymphocytes, and macrophages to an afferent extracellular fluid. In this way, the immune system can recognize and react to foreign proteins and mount an immune response or sequester these proteins as appropriate. In this reaction, there is some multiplication of the responding resistant cell line; thus, the node increases in size.

• #1 Swollen lymph nodes: Causes, diagnosis, and treatment

  https://www.medicalnewstoday.com/articles/324105

  Swollen lymph nodes, or swollen glands, in the neck may indicate an infection. They can also occur due to a medical condition, such as an immune disorder or, less commonly, cancer. Treatment can depend on the cause. […] The lymph nodes may swell when a person has an infection. The swelling occurs as a result of immune cell activity in the lymph nodes. […] Swollen lymph nodes usually signal an infection or inflammation in the body. However, less commonly, it can point to cancer. […] Swollen lymph nodes in the neck may indicate an infection. Other potential reasons a person has swollen lymph nodes in the neck include immune system conditions or, less commonly, cancer. […] Lymph nodes swell when a person has an infection because the lymph fluid traps harmful bacteria, viruses, and waste products. The nodes also contain immune cells.

• #1 Lymph Nodes: Function and Signs of Disease

  https://www.verywellhealth.com/understanding-the-purpose-of-lymph-nodes-2249122

  Lymph nodes, sometimes called lymph glands, are an important part of the immune system. Lymph nodes are clustered throughout the body and function as filters, removing foreign particles from fluids that run through the vessels of the lymphatic system. […] Swollen lymph nodes are a sign that the body is fighting an infection or disease. Some diseases can also directly affect lymph nodes, including cancers like lymphoma. […] The primary function of lymph nodes is to filter lymphatic fluid to isolate and kill foreign invaders that cause infection or disease. […] The activation of the immune system triggers a defensive response known as inflammation. Inflammation causes blood vessels to dilate (widen) to allow larger immune cells access to the site of the infection. […] Together, these effects cause lymph nodes to become red, swollen, and warm a condition referred to as lymphadenopathy or adenopathy.

• #1 Swollen Lymph Nodes (Lymphadenopathy): Symptoms, Treatment & Causes

  https://www.medicinenet.com/swollen_lymph_nodes/article.htm

  Diagnosing the cause of swollen lymph nodes may be challenging. The most important component of evaluating a swollen lymph node is a thorough medical history and a complete physical examination by a doctor. […] If the enlarged lymph nodes are suspected to be related to cancer, then a biopsy of the lymph node may determine the cancer type. […] There is no specific treatment for swollen lymph nodes. The underlying cause needs to be treated, which may result in the resolution of the swollen lymph node. […] If swollen lymph nodes are a result of an autoimmune disorder, they may shrink in size during periods of remission and then enlarge again when the illness flares up. […] If swollen lymph nodes are due to cancers, it depends on the type and stage of cancer and whether it has metastasized (spread) to other parts of the body and the lymph nodes may remain enlarged for the duration of the treatment. […] There may be complications associated with enlarged lymph nodes. If the lymph node swelling is related to an infection that is not treated, then an abscess (a pus-containing cavity) may result, which may require incisional drainage and antibiotics.

• #1 Lymphatic System: Function, Conditions & Disorders

  https://my.clevelandclinic.org/health/body/21199-lymphatic-system

  Swollen lymph nodes (lymphadenopathy) are caused by infection, inflammation, and cancer. Common infections that can cause enlarged lymph nodes include strep throat, mononucleosis, HIV, and infected skin wounds. Lymphadenitis refers to lymphadenopathy that’s caused by an infection or inflammatory condition. […] Cancers of the lymphatic system include lymphoma, which is cancer of the lymph nodes that occurs when lymphocytes grow and multiply uncontrollably. There are several different types of lymphoma, including Hodgkin’s lymphoma and non-Hodgkin’s lymphoma. Cancerous tumors can also block lymphatic ducts or be near lymph nodes and interfere with the flow of lymph through the node.

• #1 Swollen Lymph Nodes: Symptoms, Causes, and More

  https://www.healthline.com/health/swollen-lymph-nodes

  Lymph nodes swell when an infection occurs in the area where theyre located. For example, the lymph nodes in the neck can become swollen in response to an upper respiratory infection, such as the common cold. […] Serious conditions, such as immune system disorders or cancers, can cause lymph nodes throughout the body to swell. […] Any cancers that spread in the body can cause the lymph nodes to swell. When cancer from one area spreads to the lymph nodes, the survival rate decreases. Lymphoma, which is a cancer of the lymphatic system, also causes the lymph nodes to swell. […] Persistent swelling in the lymph nodes that occurs without other signs of an infection can indicate some types of cancer.

• #1 Swollen Lymph Nodes | HealthLink BC

  https://www.healthlinkbc.ca/healthwise/swollen-lymph-nodes

  Lymph nodes often swell in one location when a problem such as an injury, infection, or tumour develops in or near the lymph node. Which lymph nodes are swollen can help identify the problem. […] Common sites for swollen lymph nodes include the neck, groin, and underarms. […] When lymph nodes swell in two or more areas of the body, it is called generalized lymphadenopathy. This may be caused by: […] Cancer, such as leukemia, Hodgkin disease, and non-Hodgkin lymphoma. […] Acquired immunodeficiency syndrome (AIDS), which develops after a person contracts HIV (human immunodeficiency virus). This virus attacks the immune system, making it difficult for the body to fight off infection and some disease.

• #1 Lymphadenopathy in Children | Phoenix Children’s Hospital

  https://phoenixchildrens.org/specialties-conditions/lymphadenopathy-children

  Lymphadenopathy means swelling of the lymph nodes or glands. These glands act as filters for lymphatic fluid. This fluid contains white blood cells (lymphocytes) that help the body fight infection. Lymphadenopathy can occur in just one area of the body, such as the neck. Or it may affect lymph nodes throughout the body. The cervical lymph nodes, found in the neck, are the most common site of lymphadenopathy. […] The lymphatic system is part of the immune system. The immune system fights infection and other disease. Cells and fluid build up in the lymph nodes to help fight infection or disease. This causes the lymph nodes to get bigger. […] Enlarged lymph nodes are often near the source of infection, so their location can help find out the cause. For example, a baby with a scalp infection may have enlarged lymph nodes at the back of the neck. Swollen lymph nodes around the jaw may be a sign of an infection in the teeth or mouth. Lymphadenopathy may also affect lymph nodes throughout the body. This is common in some viral illnesses such as mono (infectious mononucleosis) or chickenpox.

• #1 Unexplained Lymphadenopathy: Evaluation and Differential Diagnosis | AAFP

  https://www.aafp.org/pubs/afp/issues/2016/1201/p896.html

  Supraclavicular adenopathy in adults and children is associated with high risk of intra-abdominal malignancy and must be evaluated promptly. […] Epitrochlear lymphadenopathy (nodes greater than 5 mm) is pathologic and usually suggestive of lymphoma or melanoma. […] Generalized lymphadenopathy is the enlargement of more than two noncontiguous lymph node groups. Significant systemic disease from infections, autoimmune diseases, or disseminated malignancy often causes generalized lymphadenopathy, and specific testing is necessary to determine the diagnosis. […] Generalized lymphadenopathy can occur with leukemias, lymphomas, and advanced metastatic carcinomas. […] Fine-needle aspiration (FNA) and core needle biopsy can aid in the diagnostic evaluation of lymph nodes when etiology is unknown or malignant risk factors are present.

• #1 Causes of Swollen Glands (Lymph Nodes) in the Neck

  https://www.health.com/condition/cold/swollen-glands-in-the-neck

  Treatment for lymphadenopathy varies according to the cause. If the reason for swollen neck glands is an infection, a person may be prescribed medications to help resolve the illness. […] When lymph nodes swell in the neck due to cancer, treatment may include chemotherapy, radiation therapy, surgery, or any combination of the three. […] Complications won’t occur only because a person has swollen lymph nodes in the neck or anywhere in the body. However, the untreated causes of lymphadenopathy may get worse. […] You may notice that the glands in your neck become swollen if you come down with a common cold, the flu, COVID, or another upper respiratory infection. Those glands are lymph nodes swelling in response to illnesses like upper respiratory infections, STIs, and tonsilitis. Swollen lymph nodes can also be caused by autoimmune disorders, certain cancers, and certain medications.

• #1 Swollen Lymph Nodes: Causes, Treatments and When to Go to the Doctor

  https://www.unitypoint.org/news-and-articles/swollen-lymph-nodes-causes-treatments-and-when-to-go-to-the-doctor

  Its true that emotional stress can have a negative impact on the immune system, making you more susceptible to infections or an inflammatory response. However, stress isnt directly tied to swollen lymph nodes. […] Typically, lymph nodes will enlarge, become firmer and tender when swollen. […] Dr. Ree says most lymph nodes will only stay swollen for a few days. There is an exception though. […] Sometimes lymph nodes can calcify and stay enlarged for life in some people, he says. […] Calcification of a lymph node refers to deposits of calcium salts within the lymph nodes tissue. This can happen for a few reasons but is often the result of a long-term or chronic condition affecting the lymph node. […] Treating the cause of the infection or inflammation will take care of the swollen or reactive nodes. […] You can relieve pain and tenderness from swollen lymph nodes by taking anti-inflammatory medications, but treating the infection or inflammation is what will ultimately help ease the pain.

• #1 Lymphadenopathy in Children | Valley Children’s Healthcare

  https://www.valleychildrens.org/services/ent/conditions-we-treat/lymphadenopathy

  The lymph glands are part of the immune system and help fight infections and other disease. They are enlarged when the body is fighting infection or other diseases. […] Since enlarged lymph nodes are often near the source of infection, their location can help find the cause. […] Treatment is usually based on the cause of the lymphadenopathy. […] Ignoring lymphadenopathy may delay treatment of a serious infection or other disease.

• #1 Lymphadenopathy – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK513250/

  The etiology of lymphadenopathy includes the following: infectious disease, neoplasm, inflammatory disease, autoimmune disease, inborn metabolic storage disorder, exposure to toxic/medication. […] The critical step in evaluation for adenopathy is a careful history and focused physical exam. The patient’s clinical presentation determines the extent of the history and physical. […] Although there is no „cookbook” for the laboratory evaluation of generalized unexplained lymphadenopathy, the initial steps are to obtain a complete blood count (CBC) with a manual differential and EBV serology. If non-diagnostic, the next steps would be PPD placement, RPR, chest x-ray, ANA, hepatitis B surface antigen, and HIV test. […] The gold standard for diagnosis of lymphadenopathy remains tissue diagnosis of the node by incisional biopsy.

• #1 Lymph Node Inflammation (Lymphadenitis): Causes and More

  https://www.healthline.com/health/lymphadenitis

  Lymph node inflammation can occur for a variety of reasons. Any infection or virus, including the common cold, can cause your lymph nodes to swell. Cancer can also cause lymph node inflammation. This includes blood cancer, such as leukemia and lymphoma. […] Because a wide range of conditions can cause lymph node inflammation, your doctor may request a biopsy. A lymph node biopsy is a short procedure in which the doctor removes a sample of lymph tissue. A pathologist will test this sample. This type of doctor examines tissue samples and interprets lab results. A biopsy is often the most reliable way to determine why lymph node inflammation has occurred.

• #1 Unexplained Lymphadenopathy: Evaluation and Differential Diagnosis | AAFP

  https://www.aafp.org/pubs/afp/issues/2016/1201/p896.html

  Lymphadenopathy is benign and self-limited in most patients. Etiologies include malignancy, infection, and autoimmune disorders, as well as medications and iatrogenic causes. […] Generalized lymphadenopathy, defined as two or more involved regions, often indicates underlying systemic disease. […] Risk factors for malignancy include age older than 40 years, male sex, white race, supraclavicular location of the nodes, and presence of systemic symptoms such as fever, night sweats, and unexplained weight loss. […] Hard or matted lymph nodes may suggest malignancy or infection. […] In adults and children, lymphadenopathy lasting less than two weeks or greater than 12 months without change in size has a low likelihood of being neoplastic. […] Exceptions include low-grade Hodgkin lymphomas and indolent non-Hodgkin lymphoma, although both typically have associated systemic symptoms.

• #1 Lymphadenopathy: Differential Diagnosis and Evaluation | AAFP

  https://www.aafp.org/pubs/afp/issues/1998/1015/p1313.html

  Although the finding of lymphadenopathy sometimes raises fears about serious illness, it is, in patients seen in primary care settings, usually a result of benign infectious causes. […] Lymphadenopathy may be the only clinical finding or one of several nonspecific findings, and the discovery of swollen lymph nodes will often raise the specter of serious illness such as lymphoma, acquired immunodeficiency syndrome or metastatic cancer. […] Supraclavicular lymphadenopathy has the highest risk of malignancy, estimated as 90 percent in patients older than 40 years and 25 percent in those younger than age 40. […] In patients with generalized lymphadenopathy, the physical examination should focus on searching for signs of systemic illness. […] Because generalized lymphadenopathy almost always indicates that a significant systemic disease is present, the clinician should consider the diseases listed in Table 4 and proceed with specific testing as indicated.

• #1 Lymphadenopathy: Differential Diagnosis and Evaluation | AAFP

  https://www.aafp.org/pubs/afp/issues/1998/1015/p1313.html

  If a diagnosis cannot be made, the clinician should obtain a biopsy of the node. […] If the lymphadenopathy is localized, the decision about when to biopsy is more difficult. […] When the cause of the lymphadenopathy remains unexplained, a three- to four-week observation period is appropriate when the clinical setting indicates a high probability of benign disease.

• #1 Swollen Lymph-Nodes Behind the Ear – Next Level Hearing Care

  https://nextlevel.alpacaaudiology.com/blog/swollen-lymph-nodes-behind-the-ear/

  If lymph nodes are swollen due to infection, the swelling is usually accompanied by other symptoms, such as: Fever, Scratchy Throat, Cough, Headache, Chills, Body Aches. […] If other symptoms accompany the swelling, those might be reason enough for you to see a healthcare provider, such as a doctor for a viral infection or an audiologist for hearing loss. However, the instances below are additional reasons to seek medical attention for swollen lymph nodes: If swelling persists for an extended time, The size of the swelling is a half inch or larger, It’s accompanied by skin irritation at the site of the swelling, Mysterious weight loss, Persistent fever, Shortness of breath. […] A few different options are available to treat the swelling, and each depends on the cause. An infection can be treated with an antibiotic prescription from your doctor. If there’s a blockage that’s caused conductive hearing loss, an audiologist can provide treatment for those cases. […] Since swollen lymph nodes are a defense mechanism to fight illness and infections, staying healthy is the best way to avoid lymph node swelling behind your ears.

• #2 Swollen lymph nodes – Symptoms & causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/swollen-lymph-nodes/symptoms-causes/syc-20353902

  Swollen lymph nodes most often happen because of infection from bacteria or viruses. Rarely, cancer causes swollen lymph nodes. […] The lymph nodes, also called lymph glands, play a vital role in the body being able to fight off infections. They work as filters, trapping viruses, bacteria and other causes of illnesses before they can infect other parts of the body. […] Lymph nodes are small, round or bean-shaped bunches of cells. Inside lymph nodes are a mix of types of immune system cells. These cells filter the lymph fluid as it goes through the body and protect the body from invaders. […] The most common cause of swollen lymph nodes is an infection, usually viral, such as the common cold. Sometimes the cause isn’t found. […] Other causes of swollen lymph nodes include: […] Lymphoma. This cancer starts in the lymph system. […] When an infection that causes swollen lymph nodes isn’t treated, a collection of pus may form. These are called abscesses. Pus contains fluid, white blood cells, dead tissue, and bacteria or other invaders. An abscess might need to be drained and treated with an antibiotic.

• #2 Lymphadenopathy – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK513250/

  Lymphatic fluid represents the totality of the body’s interstitial fluid, and the lymphatic channels conduct this fluid and label antigens with antigen-presenting cells. As the lymphatic channels progress, they converge regionally to form discreet lymph nodes. The function of the lymph node is to evaluate and, when possible, process and initiate the immune response to the presented antigens. Lymph nodes are like a mesh of reticular cells containing lobules wherein the antigens are presented to the immune system. Lobules anatomically contain 3 discreet compartments (cortex, paracortex, and medulla) in which B-cells, T-cells, and macrophages are separately sequestered. The appropriate cell line responds to the presented antigen by increasing its numbers. Cell lines can commonly multiply by 3 to 5 times in 6 to 24 hours. The reticular network can stretch to contain the cell-swollen lobules. This increases the size of the lymph node and causes the clinical phenomenon of lymphadenopathy.

• #2 Lymphadenopathy pathophysiology – wikidoc

  https://www.wikidoc.org/index.php/Lymphadenopathy_pathophysiology

  Lymph nodes are part of the immune system. As such, they are most readily palpable when fighting infections. Infections can either originate from the organs that they drain or primarily within the lymph node itself, referred to as lymphadenitis. […] The pathogenesis of lymphadenopathy is characterized by the inflammation of lymph nodes. This process is primarily due to an elevated rate of trafficking of lymphocytes into the node from the blood, exceeding the rate of outflow from the node. […] The immune response between the antigen and lymphocyte that leads to cellular proliferation and enlargement of the lymph nodes. […] Lymph nodes may also be enlarged secondarily as a result of the activation and proliferation of antigen-specific T and B cells (clonal expansion). […] Lymphatic fluid moves throughout the lymphatic system and enters lymph nodes for filtration of foreign antigen. Foreign antigens are presented to the lymphoid cells, which lead to cellular proliferation and enlargement. Under microscopy, cellular proliferation in lymphoid follicles may be identified as several mitotic figures.

• #2 Multitier mechanics control stromal adaptations in the swelling lymph node | Nature Immunology

  https://www.nature.com/articles/s41590-022-01257-4

  Thus, lymphocyte trapping is not a consequence but a cause of LN swelling. It generates an outward pressure force which is countered by the organs effective resistance. […] We next investigated which mechanical features of the LN resisted expansion. The candidate structures mediating effective resistance to swelling are the organ capsule, the FRC network and its associated ECM. […] These data suggest that the intact TRC network initially stretched upon swelling and subsequently remodeled to accommodate the increased numbers of immigrating and proliferating lymphocytes. […] We found that, compared to homeostasis (day 0), early in inflammation (day 2 to day 4) conduit collagen fibrils become progressively aligned, whereas later in inflammation (day 14) they again adopted a misaligned configuration. These results suggested that conduits stretched and bore an increased mechanical load early upon LN swelling, while at later time points, they reverted to the homeostatic state.

• #2 Lymphadenopathy – Cardiovascular Disorders – Merck Manual Professional Edition

  https://www.merckmanuals.com/professional/cardiovascular-disorders/lymphatic-disorders/lymphadenopathy

  Lymphadenopathy is palpable enlargement of 1 lymph nodes. Diagnosis is clinical. Treatment is of the causative disorder. […] Lymph nodes filter the lymphatic fluid on its way to the central venous circulation, removing cells and other material. The filtering process also presents antigens to the lymphocytes contained within the nodes. The immune response from these lymphocytes involves cellular proliferation, which can cause the nodes to enlarge (reactive lymphadenopathy). Pathogenic microorganisms carried in the lymphatic fluid can directly infect the nodes, causing lymphadenitis, and cancer cells may lodge in and proliferate in the nodes. […] Primary treatment is directed at the cause; adenopathy itself is not treated.

• #2 Swollen lymph nodes: MedlinePlus Medical EncyclopediaLock

  https://medlineplus.gov/ency/article/003097.htm

  Lymph nodes are present throughout your body. They are an important part of your immune system. Lymph nodes help your body recognize and fight germs, infections, and other foreign substances. […] The term „swollen glands” refers to enlargement of one or more lymph nodes. The medical name for swollen lymph nodes is lymphadenopathy. […] Infections are the most common cause of swollen lymph nodes. Infections that can cause them include: […] Immune or autoimmune disorders that can cause swollen lymph nodes are: […] Cancers that can cause swollen lymph nodes include: […] Which lymph nodes are swollen depends on the cause and the body parts involved. Swollen lymph nodes that appear suddenly and are painful are usually due to injury or infection. Slow, painless swelling may be due to cancer or a tumor. […] Treatment depends on the cause of the swollen nodes.

• #2 How Risky Is Lymphadenopathy? | Bangkok Cancer Hospital

  https://www.wattanosothcancerhospital.com/en/all-about-cancer/lymphadenopathy-cause-cancer-risk

  Lymphadenopathy, or enlarged lymph nodes, should not be ignored because they may be signs of lymphoma or leukemia. Let us explore how to handle it before it is too late. […] Lymphadenopathy is normally found in children, such as enlarged submandibular lymph nodes. Most occur concurrently with sinusitis, sore throat, nasal inflammation, or tonsilitis, or unknown cause. Research has shown that only 16% are cancerous. The mechanism that causes enlarged lymph node is classified as: hyperplasia, infiltration. […] Conditions that cause enlarged lymph nodes are infection such as viruses (HIV, EBV, CMV, measles or rubella), bacteria (especially Staphylococci, Tuberculosis, and Mycobacterial, Rickettsia), fungi and parasite (Toxoplasmosis). Autoimmune diseases such as connective tissue diseases (SLE, rheumatoid arthritis), drug adverse effects (epileptic drug phenytoin), Histiocytosis X, and Castleman disease. Glycoprotein-Laden Macrophage (Monocyte) such as lipid storage (Gaucher Disease). Cancer such as Non-hodgkin lymphoma or Hodgkin lymphoma), leukemia, metastatic cancer, and others, such as sarcoidosis. […] Enlarged lymph nodes can be caused by many factors. Thus, treatment is dependent on diagnosis. Most importantly, if you are unsure of the cause, it is best to seek medical attention immediately for proper diagnosis and treatment.

• #2 Lymph Nodes: Function and Signs of Disease

  https://www.verywellhealth.com/understanding-the-purpose-of-lymph-nodes-2249122

  Lymphadenopathy can occur with any cancer as cancer cells break off and get trapped by nearby lymph nodes. […] Most escaped cancer cells are killed in the lymph nodes before they can start growing elsewhere. But sometimes the lymph nodes are unable to contain the cells and are overtaken by cancer. […] Autoimmune diseases are those in which the immune system mistakenly attacks normal cells and tissues. In some cases, the immune assault directly targets lymph nodes. […] Another disease thought to involve autoimmunity, called sarcoidosis, can also cause swollen lymph glands. […] Certain medications can also cause lymphadenopathy either by triggering an immune response or an allergic or inflammatory reaction. […] COVID-19 vaccine has also been known to induce lymphadenopathy, typically in the armpit nearest the injection site.

• #2 Swollen lymph nodes behind the ear | Amplifon

  https://www.amplifon.com/uk/ear-diseases-and-disorders/lymph-nodes-behind-the-ear

  Conditions like sarcoidosis and systemic lupus erythematosus can provoke inflammation in the lymph nodes. These autoimmune disorders lead to an immune response that may result in swollen lymph nodes as the body reacts to perceived threats. […] Swollen lymph nodes can indicate serious health conditions, including parotid gland cancer and lymphoma. A common sign of lymph node cancer is the presence of painless swollen lymph nodes, which are often accompanied by symptoms such as fever, weight loss, and night sweats. […] Since swollen lymph nodes are not a disease themselves, but only a symptom of a disease, they are not treated directly. The treatment is aimed at fighting the disease that has caused the activity of the immune system and thus the swelling of the lymph node.

• #2 Lymphadenopathy (Swollen Lymph Glands)

  https://www.cancercenter.com/integrative-care/lymphadenopathy

  Lymphomas are cancers that begin in lymph nodes. A swelling in the neck, underarm or groin is often the first sign of Hodgkin lymphoma, and is a common early symptom of non-Hodgkin lymphoma. […] Treatment for cancer-related lymphadenopathy would involve the same therapies used to treat cancer. Lymphadenopathy caused by cancer is a symptom or complication of cancer, not a separate disease. Its your body reacting to the presence of cancer cells. […] Enlarged lymph nodes caused by the presence of cancer cells may or may not be surgically removed. Laboratory analysis of biopsied lymph nodes may help your care team determine the stage of the cancer and provide information on its specific characteristics. This data may also aid in tailoring treatment to your individual case, which may include a combination of surgical removal, radiation, chemotherapy and immunotherapy.

• #2 What Do Swollen Lymph Nodes Mean? – Health Images

  https://www.healthimages.com/what-do-swollen-lymph-nodes-mean/

  Swollen lymph nodes are considered local symptoms of lymphoma, meaning the cancer is located near or around the node. This swelling may be paired with breathlessness and anemia. […] This refers to cancer that travels throughout the body, through lymph and blood vessels. In metastasis, new cancer tumors form after breaking away from where the cancer cells originated.

• #2 Lymphadenopathy: Practice Essentials, Pathophysiology, Epidemiology

  https://emedicine.medscape.com/article/956340-overview

  Lymphadenopathy reflects disease involving the reticuloendothelial system, secondary to an increase in normal lymphocytes and macrophages in response to an antigen. Most lymphadenopathy in children is due to benign, self-limited disease such as viral infections. Other, less common etiologies responsible for adenopathy include nodal accumulation of inflammatory cells in response to an infection in the node (lymphadenitis), neoplastic lymphocytes or macrophages (lymphoma), or metabolite-laden macrophages in storage diseases (Gaucher disease).

• #2 Swollen Lymph Nodes: Causes, Treatments and When to Go to the Doctor

  https://www.unitypoint.org/news-and-articles/swollen-lymph-nodes-causes-treatments-and-when-to-go-to-the-doctor

  Its true that emotional stress can have a negative impact on the immune system, making you more susceptible to infections or an inflammatory response. However, stress isnt directly tied to swollen lymph nodes. […] Typically, lymph nodes will enlarge, become firmer and tender when swollen. […] Dr. Ree says most lymph nodes will only stay swollen for a few days. There is an exception though. […] Sometimes lymph nodes can calcify and stay enlarged for life in some people, he says. […] Calcification of a lymph node refers to deposits of calcium salts within the lymph nodes tissue. This can happen for a few reasons but is often the result of a long-term or chronic condition affecting the lymph node. […] Treating the cause of the infection or inflammation will take care of the swollen or reactive nodes. […] You can relieve pain and tenderness from swollen lymph nodes by taking anti-inflammatory medications, but treating the infection or inflammation is what will ultimately help ease the pain.

• #2 Swollen Lymph Nodes and Glands: Causes, Diagnosis, Treatment, Emergencies

  https://www.webmd.com/a-to-z-guides/swollen-glands

  Swollen lymph nodes are a sign that your body is fighting off an infection or an illness. […] Lymph nodes contain immune cells called lymphocytes. These cells attack bacteria, viruses, and other things that can make you sick. When you’re fighting off harmful germs, your body makes more of those immune cells. That causes the swelling. […] Your lymph nodes come across all kinds of germs, so they can be swollen for lots of reasons. Usually, it’s something that’s relatively easy to treat, such as: […] Much less often, it can be a more serious illness. They can include: […] If something more serious is causing the swelling, treatment can include: […] You get swollen lymph nodes when your body is fighting off an infection or illness. Lymph nodes are part of your lymphatic system, which help make up your immune system.

• #2 Quick Facts:Swollen Lymph Nodes – MSD Manual Consumer Version

  https://www.msdmanuals.com/home/quick-facts-heart-and-blood-vessel-disorders/lymphatic-disorders/swollen-lymph-nodes

  Lymph nodes are part of your lymphatic system, which helps fight infection and cancer. Lymph nodes are pea-sized collection points that filter out germs and cells from lymph fluid. Lymph nodes swell when your body has an infection or cancer. […] The cause of the swelling is usually a nearby skin or tissue infection or a harmless virus that goes away on its own. Sometimes the cause is a more serious infection or cancer. […] More dangerous causes of swollen lymph nodes are: An infected lymph node, Cancer. […] Normally, your body’s immune defenses kill any live germs that get into your lymph nodes. But sometimes a few germs survive and cause an infection. […] Cancer cells often break off from a cancer and travel through lymph vessels to nearby lymph nodes. […] However, probably less than 1% of people with swollen lymph nodes have cancer. […] Doctors treat the cause of your swollen lymph nodes.

• #2 Swollen Lymph Nodes | The Children’s Hospital at Montefiore

  https://www.cham.org/health-library/article?id=aa65796spec

  Lymph nodes often swell in one location when a problem such as an injury, infection, or tumor develops in or near the lymph node. Which lymph nodes are swollen can help identify the problem. […] Common sites for swollen lymph nodes include the neck, groin, and underarms. […] When lymph nodes swell in two or more areas of the body, it is called generalized lymphadenopathy. This may be caused by: […] Cancer, such as leukemia, Hodgkin disease, and non-Hodgkin lymphoma. […] Acquired immunodeficiency syndrome (AIDS), which develops after a person contracts HIV (human immunodeficiency virus). This virus attacks the immune system, making it difficult for the body to fight off infection and some disease.

• #2 Unexplained Lymphadenopathy: Evaluation and Differential Diagnosis | AAFP

  https://www.aafp.org/pubs/afp/issues/2016/1201/p896.html

  Lymphadenopathy is benign and self-limited in most patients. Etiologies include malignancy, infection, and autoimmune disorders, as well as medications and iatrogenic causes. […] Generalized lymphadenopathy, defined as two or more involved regions, often indicates underlying systemic disease. […] Risk factors for malignancy include age older than 40 years, male sex, white race, supraclavicular location of the nodes, and presence of systemic symptoms such as fever, night sweats, and unexplained weight loss. […] Hard or matted lymph nodes may suggest malignancy or infection. […] In adults and children, lymphadenopathy lasting less than two weeks or greater than 12 months without change in size has a low likelihood of being neoplastic. […] Exceptions include low-grade Hodgkin lymphomas and indolent non-Hodgkin lymphoma, although both typically have associated systemic symptoms.

• #2 Lymphadenopathy in Children | Phoenix Children’s Hospital

  https://phoenixchildrens.org/specialties-conditions/lymphadenopathy-children

  Lymphadenopathy means swelling of the lymph nodes or glands. These glands act as filters for lymphatic fluid. This fluid contains white blood cells (lymphocytes) that help the body fight infection. Lymphadenopathy can occur in just one area of the body, such as the neck. Or it may affect lymph nodes throughout the body. The cervical lymph nodes, found in the neck, are the most common site of lymphadenopathy. […] The lymphatic system is part of the immune system. The immune system fights infection and other disease. Cells and fluid build up in the lymph nodes to help fight infection or disease. This causes the lymph nodes to get bigger. […] Enlarged lymph nodes are often near the source of infection, so their location can help find out the cause. For example, a baby with a scalp infection may have enlarged lymph nodes at the back of the neck. Swollen lymph nodes around the jaw may be a sign of an infection in the teeth or mouth. Lymphadenopathy may also affect lymph nodes throughout the body. This is common in some viral illnesses such as mono (infectious mononucleosis) or chickenpox.

• #2 Swollen Lymph Nodes – Heart and Blood Vessel Disorders – Merck Manual Consumer Version

  https://www.merckmanuals.com/home/heart-and-blood-vessel-disorders/lymphatic-disorders/swollen-lymph-nodes

  The most dangerous causes of swollen lymph nodes are cancer, human immunodeficiency virus (HIV) infection, and tuberculosis (TB). […] Nodes that are hard, very enlarged, have been present for longer times (such as several weeks), and do not move when pushed may indicate cancer. Tenderness, discoloration, and warmth in and around a single enlarged lymph node may indicate an infection of the node. […] If doctors suspect cancer or lymphoma, the person has a lymph node biopsy. Biopsy may also be needed when widespread lymph node swelling does not resolve within 3 to 4 weeks.

• #2 What is a reactive lymph node?

  https://www.medicalnewstoday.com/articles/324977

  When the lymphatic system produces cells to fight pathogens, the lymph nodes swell in this process. […] A reactive lymph node describes when lymph nodes are reacting to something going on in the body. Usually, lymph nodes will swell in response to fighting an infection or injury. […] Less common causes of swollen lymph nodes include: metastatic cancer, which is cancer that has spread from its original location to the lymph nodes; lymphoma, which is cancer of the lymph nodes; sepsis, which is a type of systemic infection that can become life-threatening. […] A swollen lymph node does not necessarily mean the infection is severe. Some peoples lymph nodes swell very easily, and a person has no other symptoms. […] A doctor can help with determining whether a person has a serious infection that warrants treatment, as well as assessing for other potential causes of reactive lymph nodes.

• #3 Multitier mechanics control stromal adaptations in the swelling lymph node | Nature Immunology

  https://www.nature.com/articles/s41590-022-01257-4

  We next investigated the role of TRCs in the stretching response. […] These data suggested that TRC tension increased upon LN swelling and restored to homeostatic conditions 2 weeks after immunization. […] Our results in Talin1-deficient TRCs support the idea that adhesion-dependent mechanosensing was a critical feedback parameter that locally controlled growth and survival of the network, so that it reverted to its typical geometry, while increasing in size. […] We identified the capsule as the responsible stromal element for elevated resistance to swelling from day 8 to day 14, during which its thickness and mechanical strength were massively increased.

• #3 Unexplained Lymphadenopathy: Evaluation and Differential Diagnosis | AAFP

  https://www.aafp.org/pubs/afp/issues/2016/1201/p896.html

  Lymphadenopathy is benign and self-limited in most patients. Etiologies include malignancy, infection, and autoimmune disorders, as well as medications and iatrogenic causes. […] Generalized lymphadenopathy, defined as two or more involved regions, often indicates underlying systemic disease. […] Risk factors for malignancy include age older than 40 years, male sex, white race, supraclavicular location of the nodes, and presence of systemic symptoms such as fever, night sweats, and unexplained weight loss. […] Hard or matted lymph nodes may suggest malignancy or infection. […] In adults and children, lymphadenopathy lasting less than two weeks or greater than 12 months without change in size has a low likelihood of being neoplastic. […] Exceptions include low-grade Hodgkin lymphomas and indolent non-Hodgkin lymphoma, although both typically have associated systemic symptoms.

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