Materiały źródłowe

• #1 MCAD deficiency – Symptoms and causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/mcad-deficiency/symptoms-causes/syc-20353745

  MCAD deficiency can cause problems with your metabolism. […] If left untreated, MCAD deficiency may lead to severe lack of energy and tiredness, liver disease, coma, and other serious health problems. […] Symptoms can vary among people with MCAD deficiency. They may include: Vomiting. Low or no energy. Weak feeling. Low blood sugar. […] A sudden severe episode, called a metabolic crisis, can be due to: Going too long without eating. Missing meals. Common infections. High fever. Ongoing stomach and digestive problems that may cause vomiting and diarrhea. Intense exercise. […] If metabolic crisis caused by MCAD deficiency is left untreated, it can lead to: Seizures. Liver problems. Brain damage. Coma. Sudden death.

• #1 Medium-Chain Acyl-Coenzyme A Dehydrogenase Deficiency – GeneReviews® – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK1424/

  Individuals with medium-chain acyl-coenzyme A dehydrogenase (MCAD) deficiency typically appear normal at birth, and many are diagnosed through newborn screening programs. Symptomatic individuals experience hypoketotic hypoglycemia in response to either prolonged fasting (e.g., weaning the infant from nighttime feedings) or during intercurrent and common infections (e.g., viral gastrointestinal or upper respiratory tract infections), which typically cause loss of appetite and increased energy requirements when fever is present. […] Untreated severe hypoglycemic episodes can be accompanied by seizures, vomiting, lethargy, coma, and death. Metabolic decompensation during these episodes can result in elevated liver transaminases and hyperammonemia. Individuals with MCAD deficiency who have experienced the effects of uncontrolled metabolic decompensation are also at risk for chronic myopathy. Early identification and avoidance of prolonged fasting can ameliorate these findings. However, children with MCAD deficiency are at risk for obesity after initiation of treatment due to the frequency of feeding.

• #1 An Educator’s Guide to MCADD — New England Consortium of Metabolic Programs

  https://www.newenglandconsortium.org/an-educators-guide-to-mcadd

  Children with MCADD usually have symptoms for the first time between three months and two years of age. These symptoms are often brought on when a child stops eating, usually because of a common illness such as the flu, an ear infection, or a cold. […] MCADD can cause a metabolic crisis. A metabolic crisis may start with symptoms of fever, diarrhea, and vomiting. This is usually followed by low blood sugar. If a metabolic crisis is not treated, it can lead to breathing problems, coma, or death. Prompt treatment can prevent these consequences. […] If children with MCADD go too long without food, low blood sugar (hypoglycemia) can occur, with or without other symptoms of a metabolic crisis. Low blood sugar can cause weakness, shakiness, dizziness, or cold, clammy skin. […] Symptoms often occur after a child has nothing to eat for more than a few hours. During long periods without eating food, the glucose in the body is used up. Some of the first symptoms include: Sleepiness, Behavior changes, Irritable mood, Poor appetite, Low Energy, Fatigue, Vomiting.

• #1 Medium Chain Acyl-CoA Dehydrogenase Deficiency (MCADD) — New England Consortium of Metabolic Programs

  https://www.newenglandconsortium.org/mcadd

  Medium Chain Acyl-CoA Dehydrogenase Deficiency (MCADD) is the most frequent of the fatty acid oxidation disorders (FAOD) and one of the most frequently identified inborn errors of metabolism. The incidence of MCADD may be as high as 1/10,000 with mortality rates of 13-43% at initial crises. It is caused by an intramitochondrial defect in the – oxidation of fatty acids and is a major cause of hypoketotic hypoglycemia. MCADD is also a cause for lethargy, liver dysfunction with hepatomegaly, metabolic acidosis, hyperammonemia and sudden death. […] Affected infants and children usually present between 3 and 24 months of age particularly when being weaned from nighttime feeds but neonatal cases have been described and adults have become ill after severe exertion (e.g. jogging). The presentation is characterized by marked lethargy, often in association with vomiting after a period of fasting. This can progress to hypoglycemic seizures or coma within 1-2 hours of ONSET of symptoms. On occasion seizures or coma may be the presenting sign. Hepatomegaly is usually present. There may, or may not, be a history of a recent viral infection associated with diminished oral intake, or of a similar episode in the past. A history of recurrent Reye syndrome should alert you to the possibility of FAODs, as affected children have often been misdiagnosed as having Reye syndrome or episodic hypoglycemic coma; FAODs are responsible for 5-10% of sudden infant death syndrome. Immediate attention and therapy is the key to preventing sudden death.

• #1 MCAD Deficiency: Symptoms, Treatment, Life Expectancy

  https://www.verywellhealth.com/mcad-overview-4175022

  If MCAD deficiency isn’t treated, these symptoms can get progressively worse and lead to an „MCAD crisis.” This is a potentially life-threatening situation characterized by severe vomiting, seizures, disorientation, coma, and even death. […] When not fasting or ill, people with MCAD deficiency usually do not have any symptoms. […] If MCAD deficiency is properly managed, a person can live a long and healthy life. However, if left undiagnosed and untreated, the risk of death is estimated to be around 20%. Most deaths occur during early childhood.

• #1 Medium-Chain Acyl-Coenzyme A Dehydrogenase Deficiency – GeneReviews® – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK1424/

  Hypoglycemic episodes can be accompanied by seizures. […] Such instances of metabolic stress lead to vomiting and lethargy, which may quickly progress to coma and death. […] Hepatomegaly can arise during an acute decompensation, which is also characterized by hypoketotic hypoglycemia, elevated liver transaminases, and hyperammonemia. […] Sudden and unexpected death was historically common as the first manifestation of MCAD deficiency and still can occur as late as adulthood (e.g., precipitated by times of increased metabolic stress such as surgery or prolonged fasting). […] The advent of NBS has dramatically decreased the mortality of MCAD deficiency in the neonatal period to 0.6%-2.4% in screened populations. […] Early death due to severe hypoglycemia before the return of NBS results still occurs.

• #1 Medium-Chain Acyl-Coenzyme A Dehydrogenase Deficiency – GeneReviews® – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK1424/

  Individuals with MCAD deficiency typically have no neurologic disease. However, individuals who have experienced the effects of an uncontrolled metabolic decompensation are at risk of losing developmental milestones and acquiring aphasia and attention-deficit/hyperactivity disorder, which are thought to be secondary to brain injury sustained during the acute metabolic event. […] Individuals with MCAD deficiency who have experienced the effects of uncontrolled metabolic decompensation are also at risk for chronic myopathy, as observed in 18% of individuals who had several episodes of metabolic decompensation. […] In a long-term study of individuals with MCAD deficiency diagnosed prior to NBS, many reported fatigue, muscle pain, and reduced exercise tolerance. […] Children with MCAD deficiency are at risk for obesity after initiation of treatment due to the frequency of feeding (rather than the inherent nature of the condition itself).

• #1 The epidemiology of medium chain acyl-CoA dehydrogenase deficiency: An update | Genetics in Medicine

  https://www.nature.com/articles/gim200638

  Death has been reported to occur in up to 25% of children with MCADD not previously diagnosed who experience episodes of acute metabolic decompensation. […] The overall mortality rate among all children with MCADD is necessarily lower than that among those who experience metabolic crises, because a fraction of individuals with the disorder do not manifest signs and symptoms in childhood. […] Children who experience acute metabolic decompensation are at elevated risk of neurologic impairment and varying degrees of disability. Up to one-third of survivors of metabolic crises in MCADD are reported to experience some form of developmental delay. […] The frequency of deaths among older siblings of children with MCADD seems elevated relative to that among probands. […] The reduced ability to metabolize medium-chain fatty acids becomes problematic when individuals are faced with extra metabolic demands or reduced dietary inputs. Most often, stress induced by fasting or infection, during which the demands on fatty acid oxidation are particularly high, leads to symptomatic presentation. […] Newborn screening for MCADD clearly prevents death and disability in many children with the disorder.

• #1 Medium-Chain Acyl-CoA Dehydrogenase Deficiency – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK560837/

  Due to the heterogeneous group of mutations that result in this disease, some patients only have a modest reduction in MCAD activity and may not present until adulthood. Adult presentation is usually accompanied by severe catabolic stress and may prove fatal. Adults who present with symptomatic MCADD often report ingestion of alcohol and subsequent vomiting. Adults are also more likely to present with cardiac symptoms than younger patients. This is likely because undiagnosed adults sustain prolonged uptake of accumulated medium-chain fatty acids into their myocytes throughout childhood and adolescence.

• #1 MCAD deficiency – Diagnosis and treatment – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/mcad-deficiency/diagnosis-treatment/drc-20353747

  MCAD deficiency is diagnosed through newborn screening followed by genetic testing. […] Newborn screening at birth allows MCAD deficiency to be diagnosed and treated early, before symptoms occur, preventing complications. […] The main goal of treatment for MCAD deficiency is to prevent problems caused by your metabolism that can lead to low blood sugar. […] Recommendations to prevent low blood sugar called hypoglycemia generally include: Avoid fasting longer than recommended by your health care team. […] Know the warning signs of low blood sugar and other symptoms of a metabolic crisis.

• #1 Medium-chain acyl-coenzyme A dehydrogenase deficiency – Wikipedia

  https://en.wikipedia.org/wiki/Medium-chain_acyl-coenzyme_A_dehydrogenase_deficiency

  MCADD presents in early childhood with hypoketotic hypoglycemia and liver dysfunction, often preceded by extended periods of fasting or an infection with vomiting. […] In some individuals the first manifestation of MCADD may be sudden death following a minor illness. […] A number of individuals with MCADD may remain completely asymptomatic, provided they never encounter a situation that sufficiently stresses their metabolism. […] Clinically, MCADD or another fatty acid oxidation disorder is suspected in individuals who present with lethargy, seizures, coma and hypoketotic hypoglycemia, particularly if triggered by a minor illness. […] In some individuals, the only manifestation of MCADD is sudden, unexplained death often preceded by a minor illness that would not usually be fatal. […] Individuals with MCADD need to avoid fasting for prolonged periods of time. During illnesses, they require careful management to stave off metabolic decompensation, which can result in death.

• #1 Medium-chain acyl-CoA dehydrogenase (MCAD) deficiency

  https://www.health.wa.gov.au/Articles/U_Z/WA-Newborn-Bloodspot-Screening-Program/Conditions-screened-for-in-WA/MCAD-deficiency

  MCAD deficiency typically causes problems in infancy or early childhood. […] The children are usually well until they develop another illness such as gastroenteritis, which stops them from feeding. They then develop hypoglycaemia associated with lethargy, hepatomegaly, seizures, coma and death. About 1 in 4 children with MCAD deficiency will die from their first crisis so it is important to diagnose and treat these children early. […] Some children may never have symptoms.

• #1 Medium-Chain Acyl-CoA Dehydrogenase Deficiency – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK560837/

  The inability to provide energy to tissues when glycogen stores are depleted secondary to MCADD results in a wide array of symptoms. Hypoketotic hypoglycemia with vomiting, progressing to seizures, and coma are typical presentations of this disease. MCADD is also thought to be responsible for a small portion of sudden infant death syndrome (SIDS) cases. This disease may become evident in early childhood, typically within the first 24 months of life, or remain asymptomatic until adulthood. […] Individuals with MCADD are typically asymptomatic at birth. The vast majority of individuals with this disease are diagnosed via expanded NBS that has been adopted in many countries around the world. Individuals with severe clinical phenotypes typically present in the first 24 months of life. The onset of symptoms coincides with an intercurrent illness or an episode of prolonged fasting, as may be seen when there is a reduction in overnight feedings. The classic presentation occurs in early childhood during an acute illness, particularly gastroenteritis. Severe hypoglycemia is a characteristic feature of this disease. Other presenting symptoms include vomiting, hypoglycemia-associated seizures, lethargy, and coma. The frequency and severity of symptomatic episodes correlate poorly with the patient’s genotypes. Patients with a biochemically „milder” phenotype (eg, those carrying the c.199TC mutation) may present with neonatal decompensation and hypoglycemia. Therefore, a clinically asymptomatic phenotype cannot be reliably predicted from a „milder” biochemical phenotype.

• #2 MCAD Deficiency

  https://my.clevelandclinic.org/health/diseases/21973-mcad-deficiency

  MCAD deficiency is a genetic condition when your body can’t convert certain fats into energy. Symptoms trigger after long periods of time when you go without eating (fasting). Symptoms include feeling tired, nauseated and having low blood sugar. […] Symptoms of MCAD deficiency normally appear during early infancy and childhood and can be triggered during an illness when your child loses their appetite or undergoes long periods of time without eating. Symptoms of MCAD deficiency include: Low blood sugar (hypoglycemia). Vomiting. Low energy (lethargy). Muscle weakness. […] Serious side effects of MCAD deficiency include: Seizures. Difficulty breathing. Liver problems. Brain damage. Coma. […] Symptoms arise during long periods without eating. Scheduling meals more frequently throughout the day helps minimize symptoms of the condition. Eating complex carbohydrates like whole grains, some types of vegetables and beans before bedtime alleviates the need to wake up in the middle of the night to maintain steady glucose levels.

• #2 An Educator’s Guide to MCADD — New England Consortium of Metabolic Programs

  https://www.newenglandconsortium.org/an-educators-guide-to-mcadd

  Children with MCADD usually have symptoms for the first time between three months and two years of age. These symptoms are often brought on when a child stops eating, usually because of a common illness such as the flu, an ear infection, or a cold. […] MCADD can cause a metabolic crisis. A metabolic crisis may start with symptoms of fever, diarrhea, and vomiting. This is usually followed by low blood sugar. If a metabolic crisis is not treated, it can lead to breathing problems, coma, or death. Prompt treatment can prevent these consequences. […] If children with MCADD go too long without food, low blood sugar (hypoglycemia) can occur, with or without other symptoms of a metabolic crisis. Low blood sugar can cause weakness, shakiness, dizziness, or cold, clammy skin. […] Symptoms often occur after a child has nothing to eat for more than a few hours. During long periods without eating food, the glucose in the body is used up. Some of the first symptoms include: Sleepiness, Behavior changes, Irritable mood, Poor appetite, Low Energy, Fatigue, Vomiting.

• #2 Medium-Chain Acyl-Coenzyme A Dehydrogenase Deficiency – GeneReviews® – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK1424/

  Individuals with medium-chain acyl-coenzyme A dehydrogenase (MCAD) deficiency typically appear normal at birth, and many are diagnosed through newborn screening programs. Symptomatic individuals experience hypoketotic hypoglycemia in response to either prolonged fasting (e.g., weaning the infant from nighttime feedings) or during intercurrent and common infections (e.g., viral gastrointestinal or upper respiratory tract infections), which typically cause loss of appetite and increased energy requirements when fever is present. […] Untreated severe hypoglycemic episodes can be accompanied by seizures, vomiting, lethargy, coma, and death. Metabolic decompensation during these episodes can result in elevated liver transaminases and hyperammonemia. Individuals with MCAD deficiency who have experienced the effects of uncontrolled metabolic decompensation are also at risk for chronic myopathy. Early identification and avoidance of prolonged fasting can ameliorate these findings. However, children with MCAD deficiency are at risk for obesity after initiation of treatment due to the frequency of feeding.

• #2 MCADD (medium chain acyl-CoA dehydrogenase deficiency) – newbornscreening.info

  https://www.newbornscreening.info/mcadd-medium-chain-acyl-coa-dehydrogenase-deficiency/

  MCADD can cause bouts of illness called metabolic crises. Children with MCADD often show effects for the first time between three months and three years of age. Some of the first symptoms of a metabolic crisis are poor appetite, nausea, vomiting, diarrhea, extreme sleepiness, irritable mood and behavior changes. If not treated, breathing problems, seizures, coma, and sometimes even death can occur. […] Symptoms often happen after having nothing to eat for more than a few hours. Hypoglycemia can occur, with or without other symptoms of metabolic crisis, just by going too long without food. Hypoglycemia can cause a person to feel weak, shaky, or dizzy, and to have clammy, cold skin. If not treated, hypoglycemia can lead to a coma and even death. […] Some children with MCADD have very mild symptoms or no symptoms at all.

• #2 MCADD

  https://www.nhs.uk/conditions/mcadd/

  MCADD is a potentially serious condition that can be life-threatening if not recognised quickly and treated appropriately. […] Babies with MCADD are at risk of developing the following symptoms: irritability, poor feeding, sleepiness, floppiness, breathing difficulties, vomiting, seizures (fits), coma. […] If your baby is ill or is not feeding well, they should be given a special high-sugar drink, known as glucose polymer. This is called the emergency regimen. […] If you see no improvement after giving the emergency regimen, you should take your child to your nearest AE department immediately.

• #2 Medium Chain acyl-CoA Dehydrogenase Deficiency – Metabolic Support UKAccessibility ToolsIncrease TextDecrease TextGrayscaleHigh ContrastNegative ContrastLight BackgroundLinks UnderlineReadable FontReset

  https://metabolicsupportuk.org/condition/medium-chain-acyl-coa-dehydrogenase-deficiency/

  Symptoms of these crises may include: Unusual or extreme tiredness, feeling sluggish and no energy, Being sick, Excessive sweating, Abnormal breathing, Seizures/fits. […] However, the crises tend to vary between individuals both in symptoms and severity. Symptoms can begin suddenly and progress quickly becoming severe and life-threatening. This is especially dangerous if you do not know about the condition. MCADD can cause coma and/or death if not treated quickly, although severe problems are rarer in children older than 5 years. The addition of MCADD to the Newborn Screening Programme in the UK helps to prevent this from happening.

• #2 The epidemiology of medium chain acyl-CoA dehydrogenase deficiency: An update | Genetics in Medicine

  https://www.nature.com/articles/gim200638

  The most common fatty acid oxidation disorder, medium chain acyl-CoA dehydrogenase deficiency (MCADD), has become the focal point for the adoption of tandem mass spectrometry to detect it and related inborn errors of metabolism. […] It seems that in the absence of newborn screening for MCADD, premature death or serious disability occurs in 20% to 25% of children with the disorder. […] Despite the increase in screening, understanding of the natural history of unscreened MCADD remains limited. […] The major preventable outcomes of concern are death and intellectual disability. Death is reported to occur in up to 25% of symptomatic individuals with MCADD. […] The probability of an individual with MCADD detected by screening developing a metabolic decompensation crisis in the absence of screening is as high as 0.75.

• #2 Medium Chain Acyl-CoA Dehydrogenase Deficiency (MCAD) | Revvity

  https://www.revvity.com/disorders/medium-chain-acyl-coa-dehydrogenase-deficiency-mcad

  MCAD deficiency generally presents between the second month and the second year of life, although onset as early as two days and as late as adulthood has been reported. […] Symptoms include vomiting, lethargy, apnea, coma, cardiopulmonary arrest, or sudden unexplained death. Initial symptoms often precede the onset of profound hypoglycemia, and are probably related to high free fatty acid levels. […] Without prior indication of metabolic disease, 20–25 percent of patients with this disease will die with their first episode of illness. […] Cerebral edema, and fatty liver, heart, and kidneys are noted at autopsy, often leading to a misdiagnosis of Reye’s syndrome or Sudden Infant Death Syndrome (SIDS). This disorder accounts for about one percent of SIDS deaths.

• #2 MCADD (medium chain acyl-CoA dehydrogenase deficiency) – newbornscreening.info

  https://www.newbornscreening.info/mcadd-medium-chain-acyl-coa-dehydrogenase-deficiency/

  With prompt and careful treatment, children with MCADD usually live healthy lives with typical growth and development. The goal of treatment is to prevent long-term problems. However, children who have repeated metabolic crises may have life-long learning disabilities, spasticity, chronic muscle weakness, or other effects.

• #2 Medium-Chain Acyl-CoA Dehydrogenase Deficiency – MD Searchlight

  https://mdsearchlight.com/genetic-disorders/medium-chain-acyl-coa-dehydrogenase-deficiency/

  Patients diagnosed early with MCADD (Medium-chain acyl-CoA dehydrogenase deficiency, a rare genetic disorder that affects how the body processes fat to produce energy) and given proper care during sudden illnesses have an excellent chance of recovery. Early diagnosis through newborn screening (NBS) and follow-up care provided by centers specializing in metabolic disorders have reduced the disease’s health complications and death rates to nearly zero. Without a diagnosis, children have a mortality rate as high as 25% after experiencing the first symptoms. Moreover, many survivors can develop severe problems with brain function after this initial episode. […] One of the main concerns with this disease is that it can lead to problems with brain function, such as learning difficulties, speech problems, and attention deficit disorder. Research shows that when a person has a more severe form of the disease, it often goes hand in hand with these cognitive difficulties. To lessen this complication, it’s crucial to avoid going long periods without eating and to manage symptoms during illnesses. […] The good news is that with early diagnosis and proper treatment, the chances of brain function problems are greatly reduced.

• #2 RFTS – Home Page

  https://www.wvdhhr.org/nbms/diseases/Medium_Chain_Acyl_CoA_Dehydrogenase.asp

  Although death is certainly the most important potential outcome of not screening for MCAD deficiency, there are findings in survivors that are very concerning regarding morbidity. A follow-up survey of 78 MCAD-deficiency survivors (all older than 2 years) revealed a number of unexpected problems, including developmental disabilities, speech and language delay, behavioral problems, attention-deficit/hyperactivity disorder (ADHD), proximal muscle weakness, chronic seizure disorder, cerebral palsy, and failure to thrive. The finding of ADHD was seen in 9 patients (12%), 8 of whom were female, in contrast to the usual male preponderance of ADHD in the general population. The development of muscle weakness was strongly correlated with length of time between symptomatic presentation and the institution of appropriate measures to prevent additional episodes of illness.

• #2 Medium-chain Acyl-CoA Dehydrogenase (MCAD) Deficiency | Children’s Hospital of Philadelphia

  https://www.chop.edu/conditions-diseases/medium-chain-acyl-coa-dehydrogenase-mcad-deficiency

  Symptoms of MCAD deficiency can range from mild to severe. On the mild end, some individuals with MCAD deficiency may only have slight exercise intolerance. Children with more severe MCAD deficiency can have significant physical and intellectual disabilities. Severe MCAD deficiency usually appears in infancy. […] Symptoms of MCAD deficiency include: Low or no energy, Low blood sugar (hypoglycemia), Muscle weakness and reduced exercise tolerance, Vomiting. […] Because infants do not have significant energy storage in their bodies yet, those with MCAD deficiency can quickly become extremely sick (decompensate). […] If left untreated or not treated promptly and properly, MCAD deficiency can lead to brain injury, developmental delays, attention-deficit disorder, muscle weakness, reduced exercise tolerance, irregular heartbeats (cardiac arrhythmia), low blood sugar (hypoglycemia), liver disease, kidney disease and, in rare cases, sudden and unexpected death.

• #2 RFTS – Home Page

  https://www.wvdhhr.org/nbms/diseases/Medium_Chain_Acyl_CoA_Dehydrogenase.asp

  There are few reports of first symptoms after 4 years of age and fewer recurrent episodes after 4 years of age. Symptoms that require hospitalization during the second decade are unusual. The earliest onset of symptoms and sudden death is in the neonatal period, although this is rare, and the latest documented onset of the first episode was at 14 years of age. Most deaths would be preventable if dietary therapy and measures to prevent fasting were begun before the onset of symptoms. Cases in which children have died have, in some instances, resembled cases of SIDS or Reye syndrome. There is marked clinical variability even within the same family. There are families reported with several affected children with one child in the family dying on the first episode before 2 years of age and other children as old as 10 years never having had an episode.

• #2

  https://gmdi.org/Resources/Nutrition-Guidelines/MCAD

  Any individual with MCADD whose energy needs are not being met from exogenous sources, and who has to rely on stored fat, runs the risk of metabolic decompensation. […] MCADD infants and young children, especially during intercurrent illness, are at greater risk than older children and adults. Symptoms can range from fatigue, lethargy, hypotonia, and progress to vomiting, acidosis, hyperammonemia, hypoketotic hypoglycemia, fatty infiltration of the liver, coma and death. […] A MCADD infant, who is healthy and feeding normally, will show no signs or symptoms of the disorder.

• #2 Medium chain acyl-CoA dehydrogenase deficiency (MCADD)

  https://www.medicalnewstoday.com/articles/medium-chain-acyl-coa-dehydrogenase-deficiency

  MCADD can begin causing symptoms in childhood, usually within the first 24 months. For some, though, the symptoms do not appear until adulthood. […] The typical symptoms of MCADD occur due to low blood sugar, often beginning when children start feeding less often at night. It can also occur after a period of illness or fasting. […] In adults, symptoms may occur after an illness or consuming alcohol, particularly if a person vomits. […] The initial symptoms include: weakness, low energy, problems with breathing. […] Without treatment, symptoms can progress, causing: vomiting, seizures, lethargy, or difficulty staying awake, coma. […] Some people with MCADD have other symptoms and complications, such as: irregular heart rhythms, epilepsy, cognitive delays, liver failure. […] MCADD can affect life expectancy if a person does not get a prompt diagnosis or treatment when symptoms occur, or if they have frequent metabolic crises.

• #2 Medium-chain acyl-CoA dehydrogenase deficiency – Genomics Education Programme

  https://www.genomicseducation.hee.nhs.uk/documents/medium-chain-acyl-coa-dehydrogenase-deficiency/

  MCADD typically presents in infancy, and is precipitated by episodes of higher energy demands, for example, viral illnesses (because of the associated fever) or prolonged fasting. […] Periods of metabolic stress precipitate symptomatic episodes, which typically include poor feeding, vomiting, lethargy, drowsiness and seizures. This can quickly progress to coma and death if left untreated. […] Some individuals remain asymptomatic until adulthood until they are given a sufficient metabolic stressor, for example, significant alcohol ingestion. […] Patients have an excellent prognosis if they avoid fasting, and are managed appropriately during a crisis.

• #2 The epidemiology of medium chain acyl-CoA dehydrogenase deficiency: An update | Genetics in Medicine

  https://www.nature.com/articles/gim200638

  Death has been reported to occur in up to 25% of children with MCADD not previously diagnosed who experience episodes of acute metabolic decompensation. […] The overall mortality rate among all children with MCADD is necessarily lower than that among those who experience metabolic crises, because a fraction of individuals with the disorder do not manifest signs and symptoms in childhood. […] Children who experience acute metabolic decompensation are at elevated risk of neurologic impairment and varying degrees of disability. Up to one-third of survivors of metabolic crises in MCADD are reported to experience some form of developmental delay. […] The frequency of deaths among older siblings of children with MCADD seems elevated relative to that among probands. […] The reduced ability to metabolize medium-chain fatty acids becomes problematic when individuals are faced with extra metabolic demands or reduced dietary inputs. Most often, stress induced by fasting or infection, during which the demands on fatty acid oxidation are particularly high, leads to symptomatic presentation. […] Newborn screening for MCADD clearly prevents death and disability in many children with the disorder.

• #2 Medium-Chain Acyl-Coenzyme A Dehydrogenase Deficiency – GeneReviews® – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK1424/

  Hypoglycemic episodes can be accompanied by seizures. […] Such instances of metabolic stress lead to vomiting and lethargy, which may quickly progress to coma and death. […] Hepatomegaly can arise during an acute decompensation, which is also characterized by hypoketotic hypoglycemia, elevated liver transaminases, and hyperammonemia. […] Sudden and unexpected death was historically common as the first manifestation of MCAD deficiency and still can occur as late as adulthood (e.g., precipitated by times of increased metabolic stress such as surgery or prolonged fasting). […] The advent of NBS has dramatically decreased the mortality of MCAD deficiency in the neonatal period to 0.6%-2.4% in screened populations. […] Early death due to severe hypoglycemia before the return of NBS results still occurs.

• #2 Medium chain acyl-CoA dehydrogenase deficiency (MCADD)

  https://www.medicalnewstoday.com/articles/medium-chain-acyl-coa-dehydrogenase-deficiency

  However, with newborn screenings, people can now receive a diagnosis much sooner. With careful management, the outlook for a person with MCADD can be very good. […] The symptoms include hypoglycemia, or low blood sugar, as well as weakness, tiredness, breathing problems, vomiting, and seizures. Without treatment, there is a risk of serious complications.

• #2 MCAD Deficiency: Symptoms, Treatment, Life Expectancy

  https://www.verywellhealth.com/mcad-overview-4175022

  If MCAD deficiency isn’t treated, these symptoms can get progressively worse and lead to an „MCAD crisis.” This is a potentially life-threatening situation characterized by severe vomiting, seizures, disorientation, coma, and even death. […] When not fasting or ill, people with MCAD deficiency usually do not have any symptoms. […] If MCAD deficiency is properly managed, a person can live a long and healthy life. However, if left undiagnosed and untreated, the risk of death is estimated to be around 20%. Most deaths occur during early childhood.

• #2 Medium-chain acyl-CoA dehydrogenase deficiency | Myriad Foresight® Carrier Screen

  https://myriad.com/womens-health/diseases/medium-chain-acyl-coa-dehydrogenase-deficiency/

  Medium-chain acyl-CoA dehydrogenase (MCAD) deficiency is an inherited metabolic disorder in which fats cannot be broken down into energy to fuel the body. […] For most individuals with MCAD deficiency, symptoms first appear in infancy or early childhood and can be triggered by long periods without eating (fasting) or by illness. Symptoms include vomiting, lack of energy, low blood sugar, and an enlarged liver. Without treatment, symptoms can quickly develop into life-threatening problems including seizures, breathing problems, brain damage, coma, and death. […] In some cases, symptoms may not appear until late childhood or adulthood and can be milder. […] Early diagnosis and dietary management are crucial for the best outcome. If dietary management starts early (especially before the onset of symptoms) and is consistent, individuals with MCAD deficiency have a good prognosis with normal or near-normal lifespan. In undiagnosed and untreated cases of MCAD deficiency, symptoms can quickly cause irreversible damage or even lead to death.

• #3 Medium Chain Acyl-CoA Dehydrogenase Deficiency (MCAD) | Revvity

  https://www.revvity.com/disorders/medium-chain-acyl-coa-dehydrogenase-deficiency-mcad

  MCAD deficiency generally presents between the second month and the second year of life, although onset as early as two days and as late as adulthood has been reported. […] Symptoms include vomiting, lethargy, apnea, coma, cardiopulmonary arrest, or sudden unexplained death. Initial symptoms often precede the onset of profound hypoglycemia, and are probably related to high free fatty acid levels. […] Without prior indication of metabolic disease, 20–25 percent of patients with this disease will die with their first episode of illness. […] Cerebral edema, and fatty liver, heart, and kidneys are noted at autopsy, often leading to a misdiagnosis of Reye’s syndrome or Sudden Infant Death Syndrome (SIDS). This disorder accounts for about one percent of SIDS deaths.

• #3 Medium-Chain Acyl-CoA Dehydrogenase Deficiency – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK560837/

  The inability to provide energy to tissues when glycogen stores are depleted secondary to MCADD results in a wide array of symptoms. Hypoketotic hypoglycemia with vomiting, progressing to seizures, and coma are typical presentations of this disease. MCADD is also thought to be responsible for a small portion of sudden infant death syndrome (SIDS) cases. This disease may become evident in early childhood, typically within the first 24 months of life, or remain asymptomatic until adulthood. […] Individuals with MCADD are typically asymptomatic at birth. The vast majority of individuals with this disease are diagnosed via expanded NBS that has been adopted in many countries around the world. Individuals with severe clinical phenotypes typically present in the first 24 months of life. The onset of symptoms coincides with an intercurrent illness or an episode of prolonged fasting, as may be seen when there is a reduction in overnight feedings. The classic presentation occurs in early childhood during an acute illness, particularly gastroenteritis. Severe hypoglycemia is a characteristic feature of this disease. Other presenting symptoms include vomiting, hypoglycemia-associated seizures, lethargy, and coma. The frequency and severity of symptomatic episodes correlate poorly with the patient’s genotypes. Patients with a biochemically „milder” phenotype (eg, those carrying the c.199TC mutation) may present with neonatal decompensation and hypoglycemia. Therefore, a clinically asymptomatic phenotype cannot be reliably predicted from a „milder” biochemical phenotype.

• #3 Medium-chain Acyl-CoA Dehydrogenase (MCAD) Deficiency | Children’s Hospital of Philadelphia

  https://www.chop.edu/conditions-diseases/medium-chain-acyl-coa-dehydrogenase-mcad-deficiency

  Symptoms of MCAD deficiency can range from mild to severe. On the mild end, some individuals with MCAD deficiency may only have slight exercise intolerance. Children with more severe MCAD deficiency can have significant physical and intellectual disabilities. Severe MCAD deficiency usually appears in infancy. […] Symptoms of MCAD deficiency include: Low or no energy, Low blood sugar (hypoglycemia), Muscle weakness and reduced exercise tolerance, Vomiting. […] Because infants do not have significant energy storage in their bodies yet, those with MCAD deficiency can quickly become extremely sick (decompensate). […] If left untreated or not treated promptly and properly, MCAD deficiency can lead to brain injury, developmental delays, attention-deficit disorder, muscle weakness, reduced exercise tolerance, irregular heartbeats (cardiac arrhythmia), low blood sugar (hypoglycemia), liver disease, kidney disease and, in rare cases, sudden and unexpected death.

• #3 MCADD

  https://www.nhs.uk/conditions/mcadd/

  MCADD is a potentially serious condition that can be life-threatening if not recognised quickly and treated appropriately. […] Babies with MCADD are at risk of developing the following symptoms: irritability, poor feeding, sleepiness, floppiness, breathing difficulties, vomiting, seizures (fits), coma. […] If your baby is ill or is not feeding well, they should be given a special high-sugar drink, known as glucose polymer. This is called the emergency regimen. […] If you see no improvement after giving the emergency regimen, you should take your child to your nearest AE department immediately.

• #3 Medium-chain acyl-CoA dehydrogenase deficiency: MedlinePlus GeneticsLock

  https://medlineplus.gov/genetics/condition/medium-chain-acyl-coa-dehydrogenase-deficiency/

  Signs and symptoms of MCAD deficiency typically appear during infancy or early childhood and can include vomiting, lack of energy (lethargy), and low blood glucose (hypoglycemia). […] People with MCAD deficiency are at risk of serious complications such as seizures, breathing difficulties, liver problems, brain damage, coma, and sudden death. […] Problems related to MCAD deficiency can be triggered by periods of fasting or by illnesses such as viral infections.

• #3 Medium chain acyl-CoA dehydrogenase deficiency (MCADD)

  https://www.medicalnewstoday.com/articles/medium-chain-acyl-coa-dehydrogenase-deficiency

  MCADD can begin causing symptoms in childhood, usually within the first 24 months. For some, though, the symptoms do not appear until adulthood. […] The typical symptoms of MCADD occur due to low blood sugar, often beginning when children start feeding less often at night. It can also occur after a period of illness or fasting. […] In adults, symptoms may occur after an illness or consuming alcohol, particularly if a person vomits. […] The initial symptoms include: weakness, low energy, problems with breathing. […] Without treatment, symptoms can progress, causing: vomiting, seizures, lethargy, or difficulty staying awake, coma. […] Some people with MCADD have other symptoms and complications, such as: irregular heart rhythms, epilepsy, cognitive delays, liver failure. […] MCADD can affect life expectancy if a person does not get a prompt diagnosis or treatment when symptoms occur, or if they have frequent metabolic crises.

• #3 Medium Chain Acyl CoA Dehydrogenase Deficiency (MCADD) | Newborn Screening Ontario

  https://www.newbornscreening.on.ca/en/results/screen-positive-results/disease-information/medium-chain-acyl-coa-dehydrogenase-deficiency-mcadd/

  Most babies with MCADD are appear normal at birth but they are at risk of a serious health condition called a metabolic crisis. […] A metabolic crisis is a life-threatening episode caused by low blood sugar and/or the build-up of harmful substances in the blood. […] Symptoms of a MCADD metabolic crisis include: poor feeding, vomiting, excessive sleepiness, irritability, muscle spasms, enlarged liver. […] If a metabolic crisis is not treated, breathing problems, seizures, coma, brain damage and sometimes death can occur. […] Between episodes of metabolic crisis, children with MCADD are usually healthy. Early treatment is effective at preventing metabolic crises and permanent damage such as problems with movement, speech, and intellectual disability. […] Treatment is very effective at preventing metabolic crises. […] With early treatment and careful monitoring most babies with MCADD will lead healthy lives with normal growth and intelligence. […] As children get older, the risk of metabolic crisis decreases.

• #3 MCAD Deficiency: Symptoms, Treatment, Life Expectancy

  https://www.verywellhealth.com/mcad-overview-4175022

  If MCAD deficiency isn’t treated, these symptoms can get progressively worse and lead to an „MCAD crisis.” This is a potentially life-threatening situation characterized by severe vomiting, seizures, disorientation, coma, and even death. […] When not fasting or ill, people with MCAD deficiency usually do not have any symptoms. […] If MCAD deficiency is properly managed, a person can live a long and healthy life. However, if left undiagnosed and untreated, the risk of death is estimated to be around 20%. Most deaths occur during early childhood.

• #3 The epidemiology of medium chain acyl-CoA dehydrogenase deficiency: An update | Genetics in Medicine

  https://www.nature.com/articles/gim200638

  Death has been reported to occur in up to 25% of children with MCADD not previously diagnosed who experience episodes of acute metabolic decompensation. […] The overall mortality rate among all children with MCADD is necessarily lower than that among those who experience metabolic crises, because a fraction of individuals with the disorder do not manifest signs and symptoms in childhood. […] Children who experience acute metabolic decompensation are at elevated risk of neurologic impairment and varying degrees of disability. Up to one-third of survivors of metabolic crises in MCADD are reported to experience some form of developmental delay. […] The frequency of deaths among older siblings of children with MCADD seems elevated relative to that among probands. […] The reduced ability to metabolize medium-chain fatty acids becomes problematic when individuals are faced with extra metabolic demands or reduced dietary inputs. Most often, stress induced by fasting or infection, during which the demands on fatty acid oxidation are particularly high, leads to symptomatic presentation. […] Newborn screening for MCADD clearly prevents death and disability in many children with the disorder.

• #3 RFTS – Home Page

  https://www.wvdhhr.org/nbms/diseases/Medium_Chain_Acyl_CoA_Dehydrogenase.asp

  Medium-chain acyl-CoA dehydrogenase (MCAD; OMIM database No. 201450) deficiency is a disorder of fatty acid oxidation (FAO) first described in 19821983. The classic presentation is an episode of vomiting and lethargy after a period of fasting in a child between 3 and 15 months of age. The child may have had a previous viral infection (gastrointestinal or upper respiratory) resulting in decreased oral intake that would have little consequence in an unaffected child. The episode may result in coma, and the child may remain obtunded even after hours of treatment with intravenous glucose. Undiagnosed disease has a mortality rate of 20% to 25%, many times with death occurring during the initial episode. In a clinical review of 94 families with MCAD deficiency, 19 families (20%) had one or more unexplained child deaths. The diagnosis of MCAD deficiency was made postmortem in all cases.

• #3 RFTS – Home Page

  https://www.wvdhhr.org/nbms/diseases/Medium_Chain_Acyl_CoA_Dehydrogenase.asp

  Although death is certainly the most important potential outcome of not screening for MCAD deficiency, there are findings in survivors that are very concerning regarding morbidity. A follow-up survey of 78 MCAD-deficiency survivors (all older than 2 years) revealed a number of unexpected problems, including developmental disabilities, speech and language delay, behavioral problems, attention-deficit/hyperactivity disorder (ADHD), proximal muscle weakness, chronic seizure disorder, cerebral palsy, and failure to thrive. The finding of ADHD was seen in 9 patients (12%), 8 of whom were female, in contrast to the usual male preponderance of ADHD in the general population. The development of muscle weakness was strongly correlated with length of time between symptomatic presentation and the institution of appropriate measures to prevent additional episodes of illness.

• #3 Trait Document | My46

  https://www.my46.org/trait-document?trait=Medium-chain%20acyl-CoA%20dehydrogenase%20deficiency&parent=Carrier%20Status&type=profile

  Medium-chain acyl-coA dehydrogenase deficiency is a metabolic disorder that is characterized by the bodys inability to break down certain fats as a source of energy for the brain and other organs. Symptoms of MCAD deficiency often present when a child is in a fasting state, meaning when they are not eating. If a child with MCAD deficiency goes too long without eating, he/she often develop symptoms such as lethargy (tired and weak), vomiting, and sometimes seizures. Blood tests performed when a child has these symptoms often show low sugar levels (i.e., hypoglycemia). If the fasting state continues, stress is put on the liver and the heart, and they may stop functioning properly. In rare cases, symptoms can progress to coma and death. These episodes of acute symptoms are called crises. […] If a person with MCAD deficiency has many crises early in life, they may develop lasting symptoms, such as delayed development, attention deficit disorder, and chronic muscle weakness. If crises are avoided in childhood, development will not be impacted, and no chronic symptoms will arise from MCAD deficiency. Though rare, adolescents and adults with MCAD deficiency can have life-threatening crises, and therefore, awareness and management is required throughout life.

• #3 Medium-Chain Acyl-CoA Dehydrogenase Deficiency – MD Searchlight

  https://mdsearchlight.com/genetic-disorders/medium-chain-acyl-coa-dehydrogenase-deficiency/

  Some babies with MCADD might show symptoms of a fast, irregular heartbeat caused by a buildup of medium-chain acylcarnitines. There have also been reports of an irregular heartbeat coming from the upper chambers of the heart. Also, MCADD can be associated with sudden and unexplained death in infants. Some reports suggest that MCADD could be a factor in up to 1% of all such cases. Autopsies of patients who died suddenly from MCADD often show brain swelling and fatty infiltration in the liver, heart, and kidneys. […] Because different genetic mutations can cause MCADD, some patients might only have a modest reduction in MCAD activity and may not show symptoms until adulthood. Adults usually show symptoms during periods of severe catabolic stress, which can be life-threatening. Adults with symptomatic MCADD often report drinking alcohol followed by vomiting. Unlike younger patients, adults are more likely to show symptoms related to the heart. This likely happens because undiagnosed adults have medium-chain fatty acids accumulating in their heart muscle cells for many years during childhood and adolescence.

• #3 Medium-Chain Acyl-CoA Dehydrogenase Deficiency – MD Searchlight

  https://mdsearchlight.com/genetic-disorders/medium-chain-acyl-coa-dehydrogenase-deficiency/

  Patients diagnosed early with MCADD (Medium-chain acyl-CoA dehydrogenase deficiency, a rare genetic disorder that affects how the body processes fat to produce energy) and given proper care during sudden illnesses have an excellent chance of recovery. Early diagnosis through newborn screening (NBS) and follow-up care provided by centers specializing in metabolic disorders have reduced the disease’s health complications and death rates to nearly zero. Without a diagnosis, children have a mortality rate as high as 25% after experiencing the first symptoms. Moreover, many survivors can develop severe problems with brain function after this initial episode. […] One of the main concerns with this disease is that it can lead to problems with brain function, such as learning difficulties, speech problems, and attention deficit disorder. Research shows that when a person has a more severe form of the disease, it often goes hand in hand with these cognitive difficulties. To lessen this complication, it’s crucial to avoid going long periods without eating and to manage symptoms during illnesses. […] The good news is that with early diagnosis and proper treatment, the chances of brain function problems are greatly reduced.

• #3

  https://www.kkh.com.sg/patient-care/conditions-treatments/medium-chain-acyl-coa-dehydrogenase-deficiency

  Most people with MCADD do not show any symptoms unless they are sick, vomiting or not eating well. […] Symptoms or signs that may be seen during illness or times of fasting: Lethargy tired and sleepy, Hypoglycaemia (low blood sugar), Vomiting, Shakiness, Irritability. […] Left untreated, this can progress to: Heart problems, Enlarged liver (hepatomegaly), Seizures, Breathing problems, Coma, Death. […] The health outcome for most individuals with MCADD is excellent. Growth, development and general health are expected to be normal if the diagnosis is made early and emergency treatment is given during periods of illness or poor feeding.

• #3 Medium-chain acyl-CoA dehydrogenase deficiency – Genomics Education Programme

  https://www.genomicseducation.hee.nhs.uk/documents/medium-chain-acyl-coa-dehydrogenase-deficiency/

  MCADD typically presents in infancy, and is precipitated by episodes of higher energy demands, for example, viral illnesses (because of the associated fever) or prolonged fasting. […] Periods of metabolic stress precipitate symptomatic episodes, which typically include poor feeding, vomiting, lethargy, drowsiness and seizures. This can quickly progress to coma and death if left untreated. […] Some individuals remain asymptomatic until adulthood until they are given a sufficient metabolic stressor, for example, significant alcohol ingestion. […] Patients have an excellent prognosis if they avoid fasting, and are managed appropriately during a crisis.

• #3 MCADD (medium chain acyl-CoA dehydrogenase deficiency) – newbornscreening.info

  https://www.newbornscreening.info/mcadd-medium-chain-acyl-coa-dehydrogenase-deficiency/

  MCADD can cause bouts of illness called metabolic crises. Children with MCADD often show effects for the first time between three months and three years of age. Some of the first symptoms of a metabolic crisis are poor appetite, nausea, vomiting, diarrhea, extreme sleepiness, irritable mood and behavior changes. If not treated, breathing problems, seizures, coma, and sometimes even death can occur. […] Symptoms often happen after having nothing to eat for more than a few hours. Hypoglycemia can occur, with or without other symptoms of metabolic crisis, just by going too long without food. Hypoglycemia can cause a person to feel weak, shaky, or dizzy, and to have clammy, cold skin. If not treated, hypoglycemia can lead to a coma and even death. […] Some children with MCADD have very mild symptoms or no symptoms at all.

• #3 MCAD Deficiency: Symptoms, Causes and Treatment

  https://www.medicoverhospitals.in/diseases/mcad-deficiency/

  With early diagnosis and appropriate management, the prognosis for individuals with MCAD deficiency is generally favourable. Most individuals can lead everyday, healthy lives with proper dietary management and lifestyle modifications. However, undiagnosed or untreated cases can result in severe complications, including metabolic crises and sudden death. […] Symptoms may include hypoglycemia, vomiting, and lethargy, indicating a fatty acid oxidation disorder.

• #4 MCAD Deficiency: Symptoms, Treatment, Life Expectancy

  https://www.verywellhealth.com/mcad-overview-4175022

  Medium chain acyl-coenzyme A dehydrogenase deficiency (MCAD deficiency) is a rare and potentially serious inherited condition that affects the body’s ability to convert a certain fat into energy. Symptoms like vomiting and trouble breathing can develop soon after birth and turn deadly if left untreated. […] Symptoms of MCAD deficiency usually start early in life and generally appear soon after a child has gone for a long stretch without eating. With prolonged fasting, children with MCAD deficiency experience sudden hypoglycemia (low blood sugar) and liver dysfunction. […] Symptoms of MCAD deficiency typically start between the ages of 1 month and 2 years and many include: Lethargy, Weakness, Sleepiness, Floppiness (poor muscle tone), Trouble breathing, Rapid breathing, Shakiness, Pale skin, Sweating, Irritability, Swollen tummy (due to an enlarged liver), Vomiting.

• #4 Medium-Chain Acyl-CoA Dehydrogenase Deficiency – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK560837/

  Due to the heterogeneous group of mutations that result in this disease, some patients only have a modest reduction in MCAD activity and may not present until adulthood. Adult presentation is usually accompanied by severe catabolic stress and may prove fatal. Adults who present with symptomatic MCADD often report ingestion of alcohol and subsequent vomiting. Adults are also more likely to present with cardiac symptoms than younger patients. This is likely because undiagnosed adults sustain prolonged uptake of accumulated medium-chain fatty acids into their myocytes throughout childhood and adolescence.

• #4

  https://www.sgh.com.sg/patient-care/conditions-treatments/medium-chain-acyl-coa-dehydrogenase-deficiency

  Most people with MCADD do not show any symptoms unless they are sick, vomiting or not eating well. […] Symptoms or signs that may be seen during illness or times of fasting: Lethargy tired and sleepy, Hypoglycaemia (low blood sugar), Vomiting, Shakiness, Irritability. […] Left untreated, this can progress to: Heart problems, Enlarged liver (hepatomegaly), Seizures, Breathing problems, Coma, Death.

• #4 MCAD Deficiency: Symptoms, Causes and Treatment

  https://www.medicoverhospitals.in/diseases/mcad-deficiency/

  With early diagnosis and appropriate management, the prognosis for individuals with MCAD deficiency is generally favourable. Most individuals can lead everyday, healthy lives with proper dietary management and lifestyle modifications. However, undiagnosed or untreated cases can result in severe complications, including metabolic crises and sudden death. […] Symptoms may include hypoglycemia, vomiting, and lethargy, indicating a fatty acid oxidation disorder.

• #5 Medium Chain acyl-CoA Dehydrogenase Deficiency – Metabolic Support UKAccessibility ToolsIncrease TextDecrease TextGrayscaleHigh ContrastNegative ContrastLight BackgroundLinks UnderlineReadable FontReset

  https://metabolicsupportuk.org/condition/medium-chain-acyl-coa-dehydrogenase-deficiency/

  Symptoms of these crises may include: Unusual or extreme tiredness, feeling sluggish and no energy, Being sick, Excessive sweating, Abnormal breathing, Seizures/fits. […] However, the crises tend to vary between individuals both in symptoms and severity. Symptoms can begin suddenly and progress quickly becoming severe and life-threatening. This is especially dangerous if you do not know about the condition. MCADD can cause coma and/or death if not treated quickly, although severe problems are rarer in children older than 5 years. The addition of MCADD to the Newborn Screening Programme in the UK helps to prevent this from happening.

• #5 Medium-Chain Acyl-Coenzyme A Dehydrogenase Deficiency – GeneReviews® – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK1424/

  Hypoglycemic episodes can be accompanied by seizures. […] Such instances of metabolic stress lead to vomiting and lethargy, which may quickly progress to coma and death. […] Hepatomegaly can arise during an acute decompensation, which is also characterized by hypoketotic hypoglycemia, elevated liver transaminases, and hyperammonemia. […] Sudden and unexpected death was historically common as the first manifestation of MCAD deficiency and still can occur as late as adulthood (e.g., precipitated by times of increased metabolic stress such as surgery or prolonged fasting). […] The advent of NBS has dramatically decreased the mortality of MCAD deficiency in the neonatal period to 0.6%-2.4% in screened populations. […] Early death due to severe hypoglycemia before the return of NBS results still occurs.

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