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The National Institute of Neurological Disorders and Stroke (NINDS), one of several institutes of the National Institutes of Health (NIH), conducts and funds research aimed at understanding normal brain development, as well as disease-related disorders of the brain and nervous system. Other NIH institutes and centers a...
Trimethylaminuria is an uncommon genetic disorder; its incidence is unknown.
These resources address the diagnosis or management of familial HDL deficiency: - Genetic Testing Registry: Familial hypoalphalipoproteinemia These resources from MedlinePlus offer information about the diagnosis and management of various health conditions: - Diagnostic Tests - Drug Therapy - Surgery and Rehabili...
- Childhood nephrotic syndrome is not a disease in itself; rather, it is a group of symptoms that - indicate kidney damageparticularly damage to the glomeruli, the tiny units within the kidney where blood is filtered - result in the release of too much protein from the body into the urine - The two types of ...
What causes autosomal dominant craniometaphyseal dysplasia? Autosomal dominant craniometaphyseal dysplasia is caused by mutations in the ANKH gene. The ANKH gene provides instructions for making a protein that is present in bone and transports a molecule called pyrophosphate out of cells. Pyrophosphate helps regulate b...
These resources address the diagnosis or management of Behet disease: - American Behcet's Disease Association: Diagnosis - American Behcet's Disease Association: Treatments - Genetic Testing Registry: Behcet's syndrome These resources from MedlinePlus offer information about the diagnosis and management of various...
Polycythemia vera (PV) is a condition characterized by an increased number of red blood cells in the bloodstream. Affected people may also have excess white blood cells and platelets. These extra cells cause the blood to be thicker than normal, increasing the risk for blood clots that can block blood flow in arteries a...
Bowen-Conradi syndrome is caused by a mutation in the EMG1 gene. This gene provides instructions for making a protein that is involved in the production of cellular structures called ribosomes, which process the cell's genetic instructions to create new proteins. Ribosomes are assembled in a cell compartment called the...
Sandhoff disease is a rare inherited disorder that progressively destroys nerve cells (neurons) in the brain and spinal cord. The most common and severe form of Sandhoff disease becomes apparent in infancy. Infants with this disorder typically appear normal until the age of 3 to 6 months, when their development slows ...
This condition is inherited in an autosomal dominant pattern, which means one copy of an altered gene in each cell is sufficient to cause the disorder. In many cases, a person with distal arthrogryposis type 1 has a parent and other close family members with the condition.
As the name suggests, mutations in the COL4A1 gene cause COL4A1-related brain small vessel disease. The COL4A1 gene provides instructions for making one component of a protein called type IV collagen. Type IV collagen molecules attach to each other to form complex protein networks. These protein networks are the main c...
Nicolaides-Baraitser syndrome is caused by mutations in the SMARCA2 gene. This gene provides instructions for making one piece (subunit) of a group of similar protein complexes known as SWI/SNF complexes. These complexes regulate gene activity (expression) by a process known as chromatin remodeling. Chromatin is the ne...
Bradyopsia appears to be rare. Only a few affected individuals worldwide have been described in the medical literature.
Gastric cancer is the fourth most common form of cancer worldwide, affecting 900,000 people per year. HDGC probably accounts for less than 1 percent of these cases.
Holes in the heart are simple congenital (kon-JEN-ih-tal) heart defects. Congenital heart defects are problems with the heart's structure that are present at birth. These defects change the normal flow of blood through the heart. The heart has two sides, separated by an inner wall called the septum. Wi...
Potocki-Shaffer syndrome is a rare condition, although its prevalence is unknown. Fewer than 100 cases have been reported in the scientific literature.
- Tests used for diagnosing diabetes and prediabetes include the A1C testfor type 2 diabetes and prediabetesthe fasting plasma glucose (FPG) test, and the oral glucose tolerance test (OGTT). Another blood test, the random plasma glucose (RPG) test, is sometimes used to diagnose diabetes when symptoms are present during...
Infantile-onset ascending hereditary spastic paralysis is a rare disorder, with at least 30 cases reported in the scientific literature.
Have you ever felt dizzy, lightheaded, or as if the room is spinning around you? If the feeling happens often, it could be a sign of a balance problem. Balance problems can make you feel unsteady or as if you were moving, spinning, or floating. They are one cause of falls and fall-related injuries, such as hip fracture...
Neuromuscular disorders affect the nerves that control your voluntary muscles. Voluntary muscles are the ones you can control, like in your arms and legs. Your nerve cells, also called neurons, send the messages that control these muscles. When the neurons become unhealthy or die, communication between your nervous sys...
Myelofibrosis is a disorder of the bone marrow, in which the marrow is replaced by fibrous (scar) tissue. Scarring of the bone marrow causes anemia, which can lead to fatigue and weakness, as well as pooling of the blood in abnormal sites like the liver and spleen, causing these organs to swell. Although myelofibrosis ...
Malignant eccrine spiradenoma is a type of tumor that develops from a sweat gland in the skin. It starts as a rapidly-growing bump on the head or abdomen, and may cause tenderness, redness, or an open wound. The exact cause of malignant eccrine spiradenoma is unknown, though it is thought that sun exposure or problem...
Diabetes mellitus type 1 (DM1) is a condition in which cells in the pancreas (beta cells) stop producing insulin, causing abnormally high blood sugar levels. Lack of insulin results in the inability of the body to use glucose for energy and control the amount of sugar in the blood. DM1 can occur at any age, but usually...
If you are pregnant with more than one baby, you are far from alone. Multiple births are up in the United States. More women are having babies after age 30 and more are taking fertility drugs. Both boost the chance of carrying more than one baby. A family history of twins also makes multiples more likely. Years ago,...
SRY-positive 46,XX testicular disorder of sex development is almost never inherited. This condition results from the translocation of a Y chromosome segment containing the SRY gene during the formation of sperm (spermatogenesis). Affected people typically have no history of the disorder in their family and cannot pass ...
This condition is inherited in an X-linked recessive pattern. The gene associated with this condition is located on the X chromosome, which is one of the two sex chromosomes. In males (who have only one X chromosome), one altered copy of the gene in each cell is sufficient to cause the condition. In females (who have t...
Your peritoneum is the tissue that lines your abdominal wall and covers most of the organs in your abdomen. A liquid, peritoneal fluid, lubricates the surface of this tissue. Disorders of the peritoneum are not common. They include - Peritonitis - an inflammation of the peritoneum - Cancer - Complication...
What causes congenital diaphragmatic hernia? Congenital diaphragmatic hernia (CDH) can occur as an isolated finding, as part of a genetic syndrome or chromosome abnormality, or as part of a complex but nonsyndromic set of findings. Currently, about 15%-20% of individuals with CDH have an identifiable cause for their di...
This condition is inherited in an autosomal recessive pattern, which means both copies of the gene in each cell have mutations. The parents of an individual with an autosomal recessive condition each carry one copy of the mutated gene, but they typically do not show signs and symptoms of the condition.
Mucopolysaccharidosis type IIIC (MPS IIIC) is an genetic disorder that makes the body unable to break down large sugar molecules called glycosaminoglycans (GAGs, formerly called mucopolysaccharides). Specifically, people with this condition are unable to break down a GAG called heparan sulfate. Affected individuals can...
The appendix is a small, tube-like organ attached to the first part of the large intestine. It is located in the lower right part of the abdomen. It has no known function. A blockage inside of the appendix causes appendicitis. The blockage leads to increased pressure, problems with blood flow, and inflammation. If the ...
This condition is inherited in an autosomal recessive pattern, which means both copies of the gene in each cell have mutations. The parents of an individual with an autosomal recessive condition each carry one copy of the mutated gene, but they typically do not show signs and symptoms of the condition.
Normal pressure hydrocephalus (NPH) is an abnormal buildup of cerebrospinal fluid (CSF) in the brain's ventricles, or cavities. It occurs if the normal flow of CSF throughout the brain and spinal cord is blocked in some way. This causes the ventricles to enlarge, putting pressure on the brain. Normal pressure hydroceph...
Is genetic testing available for X-linked congenital stationary night blindness? Yes. About 45% of individuals with XLCSNB have the complete form, which is caused by mutations in the NYX gene. The other 55% have the incomplete form, which is caused by mutations in the CACNA1F gene. The Genetic Testing Registry (GTR) pr...
The most common risk factor for cardiogenic shock is having a heart attack. If you've had a heart attack, the following factors can further increase your risk for cardiogenic shock: Older age A history of heart attacks or heart failure Coronary heart disease that affec...
This condition is inherited in an autosomal recessive pattern, which means both copies of the gene in each cell have mutations. The parents of an individual with an autosomal recessive condition each carry one copy of the mutated gene, but they typically do not show signs and symptoms of the condition.
This condition is inherited in an autosomal recessive pattern, which means both copies of the gene in each cell have mutations. The parents of an individual with an autosomal recessive condition each carry one copy of the mutated gene, but they typically do not show signs and symptoms of the condition.
Angiostrongylus cantonensis is a parasitic worm of rats. It is also called the rat lungworm. The adult form of the parasite is found only in rodents. Infected rats pass larvae of the parasite in their feces. Snails and slugs get infected by ingesting the larvae. These larvae mature in snails and slugs but do not become...
Summary : Radiation is energy that travels in the form of waves or high-speed particles. It occurs naturally in sunlight. Man-made radiation is used in X-rays, nuclear weapons, nuclear power plants and cancer treatment. If you are exposed to small amounts of radiation over a long time, it raises your risk of cancer...
Cancer prevention clinical trials are used to study ways to prevent cancer. Cancer prevention clinical trials are used to study ways to lower the risk of developing certain types of cancer. Some cancer prevention trials are conducted with healthy people who have not had cancer but who have an increa...
Certain factors affect prognosis (chance of recovery) and treatment options. The prognosis (chance of recovery) and treatment options depend on the following: - Whether the tumor is a low-grade or high-grade astrocytoma. - Where the tumor has formed in the CNS and if it has spread to nearby tissue or to othe...
Bleeding is the loss of blood. It can happen inside or outside the body. Bleeding can be a reaction to a cut or other wound. It can also result from an injury to internal organs. There are many situations in which you might bleed. A bruise is bleeding under the skin. Some strokes are caused by bleeding in the brain....
The National Institute of Neurological Disorders and Stroke (NINDS) and other institutes of the National Institutes of Health (NIH) conduct research related to congenital myopathies in their laboratories at the NIH and also support additional research through grants to major medical institutions across the country. Muc...
In the United States, 1 in 4 women dies from heart disease. The most common cause of heart disease in both men and women is narrowing or blockage of the coronary arteries, the blood vessels that supply blood to the heart itself. This is called coronary artery disease, and it happens slowly over time. It's the major rea...
The NINDS conducts and supports a broad range of research on movement disorders including tardive dyskinesia. The goals of this research are to improve understanding of these disorders and to discover ways to treat, prevent, and, ultimately, cure them.
This condition is inherited in an autosomal dominant pattern, which means one copy of the altered NOTCH2 gene in each cell is sufficient to cause the disorder. Most cases result from new mutations in the gene and occur in people with no history of the disorder in their family. Less commonly, an affected person inherits...
MPAN is a rare condition that is estimated to affect less than 1 in 1 million people.
This condition is inherited in an autosomal recessive pattern, which means both copies of the gene in each cell have mutations. The parents of an individual with an autosomal recessive condition each carry one copy of the mutated gene, but they typically do not show signs and symptoms of the condition.
How is Dyggve-Melchior-Clausen syndrome diagnosed? DMC syndrome may be suspected following a thorough clinical evaluation, a detailed patient history, and identification of characteristic findings (e.g., barrel chest, and disproportionate short stature). Radiographs may confirm specific skeletal abnormalities and findi...
Carbamoyl phosphate synthetase I deficiency is a rare disorder; its overall incidence is unknown. Researchers in Japan have estimated that it occurs in 1 in 800,000 newborns in that country.
A child who has heritable retinoblastoma has an increased risk of trilateral retinoblastoma and other cancers. A child with heritable retinoblastoma has an increased risk of a pineal tumor in the brain. When retinoblastoma and a brain tumor occur at the same time, it is called trilateral retinoblastoma. The brain tumor...
Diabetes means your blood glucose (often called blood sugar) is too high. Your blood always has some glucose in it because your body needs glucose for energy to keep you going. But too much glucose in the blood isn't good for your health. Glucose comes from the food you eat and is also made in your liver and muscles. Y...
Ornithine transcarbamylase deficiency is believed to occur in approximately 1 in every 80,000 people.
Christianson syndrome is a disorder that primarily affects the nervous system. This condition becomes apparent in infancy. Its characteristic features include delayed development, intellectual disability, an inability to speak, problems with balance and coordination (ataxia), and difficulty standing or walking. Individ...
Summary : Many U.S. households have guns, but they can cause harm if not handled properly. Here are some things you can do to keep yourself and your family safe: - Teach children that they shouldn't touch guns and that if they see a gun, to leave it alone and tell an adult. - If your children play at another ...
Tarsal carpal coalition syndrome is a genetic condition characterized by fusion of the bones in the wrist (carpals), feet (tarsals), and the fingers and toes (phalanges). Other bone abnormalities in the hands and feet may be present. Approximately 10 affected families have been described. Tarsal carpal coalition syndro...
Is genetic testing for 21-hydroxylase-deficient congenital adrenal hyperplasia available? Yes. Genetic testing of 21-hydroxylase-deficient congenital adrenal hyperplasia is available. In most people with this condition, the genetic test result can be used to predict disease severity. Click here to view a list of labora...
There is no cure for heart failure, but it can be controlled by treating the underlying conditions that cause it. Treatment for heart failure will depend on the type and stage of heart failure (the severity of the condition). The goals for treatment of all stages of heart failure are to reduce symptoms, treat the cause...
These resources address the diagnosis or management of IMAGe syndrome: - Gene Review: Gene Review: IMAGe Syndrome - Genetic Testing Registry: Intrauterine growth retardation, metaphyseal dysplasia, adrenal hypoplasia congenita, and genital anomalies - National Institutes of Health Clinical Center: Managing Adrenal I...
A week or two after the blisters erupt, the oozing sores will begin to crust over. The sores are usually gone after another two weeks. The pain usually decreases over the next few weeks, but some patients may have pain for months -- sometimes, for years.
This condition is inherited in an autosomal dominant pattern, which means one copy of the altered gene in each cell is sufficient to cause the disorder. In many cases, an affected person has a parent and other family members with the condition. While most people with Buschke-Ollendorff syndrome have both connective tis...
Dubin-Johnson syndrome is caused by mutations in the ABCC2 gene. The ABCC2 gene provides instructions for making a protein called multidrug resistance protein 2 (MRP2). This protein acts as a pump to transport substances out of the liver, kidneys, intestine, or placenta so they can be excreted from the body. For exampl...
No genetic mutations are known to cause an abdominal wall defect. Multiple genetic and environmental factors likely influence the development of this disorder. Omphalocele and gastroschisis are caused by different errors in fetal development. Omphalocele occurs during an error in digestive tract development. During th...
Gum disease is caused by dental plaque -- a sticky film of bacteria that builds up on teeth. Regular brushing and flossing help get rid of plaque. But plaque that is not removed can harden and form tartar that brushing doesn't clean. Only a professional cleaning by a dentist or dental hygienist can remove tartar.
How is nonalcoholic steatohepatitis diagnosed? NASH is usually first suspected when elevations are noted in liver tests that are included in routine blood test panels. These may include alanine aminotransferase (ALT) or aspartate aminotransferase (AST). When further evaluation shows no apparent reason for liver disease...
PFIC is estimated to affect 1 in 50,000 to 100,000 people worldwide. PFIC type 1 is much more common in the Inuit population of Greenland and the Old Order Amish population of the United States.
What are the signs and symptoms of Hypercholesterolemia, autosomal dominant? The Human Phenotype Ontology provides the following list of signs and symptoms for Hypercholesterolemia, autosomal dominant. If the information is available, the table below includes how often the symptom is seen in people with this condition....
Familial erythrocytosis is an inherited condition characterized by an increased number of red blood cells (erythrocytes). The primary function of these cells is to carry oxygen from the lungs to tissues and organs throughout the body. Signs and symptoms of familial erythrocytosis can include headaches, dizziness, noseb...
When your kidneys fail, they are no longer able to filter blood and remove waste from your body well enough to maintain health. Kidney failure causes harmful waste and excess fluid to build up in your body. Your blood pressure may rise, and your hands and feet may swell. Since the kidneys are not working well, the goal...
What are the signs and symptoms of Unna-Thost palmoplantar keratoderma? The Human Phenotype Ontology provides the following list of signs and symptoms for Unna-Thost palmoplantar keratoderma. If the information is available, the table below includes how often the symptom is seen in people with this condition. You can u...
The symptoms of CHHF, as reported in the only described patient, resemble those of other South American hemorrhagic fevers, such as Argentine HF or Bolivian HF. The incubation period is unknown, but for Argentine hemorrhagic fever (AHF) is 6 to 16 days. The CHHF clinical course included: - fever - h...
Studies show that approximately 1 in 450 males has the genetic change that leads to FXTAS, although the condition occurs in only about 40 percent of them. It is estimated that 1 in 3,000 men over age 50 is affected. Similarly, 1 in 200 females has the genetic change, but only an estimated 16 percent of them develop sig...
Hemophagocytic lymphohistiocytosis (HLH) is a condition in which the body makes too many activated immune cells (macrophages and lymphocytes). People with HLH usually develop symptoms within the first months or years of life which may include fever, enlarged liver or spleen, cytopenia (lower-than-normal number of blood...
These resources address the diagnosis or management of thrombotic thrombocytopenic purpura: - Genetic Testing Registry: Upshaw-Schulman syndrome - MedlinePlus Encyclopedia: Blood Clots - MedlinePlus Encyclopedia: Hemolytic anemia - MedlinePlus Encyclopedia: Purpura - MedlinePlus Encyclopedia: Thrombocytopenia - M...
Mutations in the OCRL gene cause Lowe syndrome. The OCRL gene provides instructions for making an enzyme that helps modify fat (lipid) molecules called membrane phospholipids. By controlling the levels of specific membrane phospholipids, the OCRL enzyme helps regulate the transport of certain substances to and from the...
This condition is inherited in an autosomal dominant pattern, which means one copy of the altered gene in each cell is sufficient to cause the disorder.
These resources address the diagnosis or management of polycystic kidney disease: - Gene Review: Gene Review: Polycystic Kidney Disease, Autosomal Dominant - Gene Review: Gene Review: Polycystic Kidney Disease, Autosomal Recessive - Genetic Testing Registry: Polycystic kidney disease 2 - Genetic Testing Registry: P...
Mal de debarquement syndrome is a balance disorder that most commonly develops following an ocean cruise or other type of water travel and less commonly following air travel, train travel, or other motion experiences. The symptoms typically reported include: persistent sensation of motion such as rocking, swaying, and/...
You can't prevent pernicious anemia caused by a lack of intrinsic factor. Without intrinsic factor, you won't be able to absorb vitamin B12 and will develop pernicious anemia. Although uncommon, some people develop pernicious anemia because they don't get enough vitamin B12 in their diets. You can take...
These resources address the diagnosis or management of North American Indian childhood cirrhosis: - Children's Organ Transplant Association - Genetic Testing Registry: North american indian childhood cirrhosis These resources from MedlinePlus offer information about the diagnosis and management of various health co...
Mutations in the FRMD7 gene cause X-linked infantile nystagmus. The FRMD7 gene provides instructions for making a protein whose exact function is unknown. This protein is found mostly in areas of the brain that control eye movement and in the light-sensitive tissue at the back of the eye (retina). Research suggests tha...
MCPH can result from mutations in at least seven genes. Mutations in the ASPM gene are the most common cause of the disorder, accounting for about half of all cases. The genes associated with MCPH play important roles in early brain development, particularly in determining brain size. Studies suggest that the proteins...
Coffin-Lowry syndrome is a condition that affects many parts of the body. The signs and symptoms are usually more severe in males than in females, although the features of this disorder range from very mild to severe in affected women. Males with Coffin-Lowry syndrome typically have severe to profound intellectual dis...
Symptoms of primary myelofibrosis include pain below the ribs on the left side and feeling very tired. Primary myelofibrosis often does not cause early signs or symptoms. It may be found during a routine blood test. Signs and symptoms may be caused by primary myelofibrosis or by other conditions. Check with your doctor...
The NINDS conducts a broad range of research on neuromuscular disorders such as PLS. This research is aimed at developing techniques to diagnose, treat, prevent, and ultimately cure these devastating diseases.
These resources address the diagnosis or management of hereditary cerebral amyloid angiopathy: - Genetic Testing Registry: Cerebral amyloid angiopathy, APP-related - Genetic Testing Registry: Dementia familial British - Genetic Testing Registry: Dementia, familial Danish - Genetic Testing Registry: Hereditary cereb...
Cold-induced sweating syndrome is inherited in anautosomal recessive pattern, which means both copies of the CRLF1 or CLCF1 gene in each cell have mutations. The parents of an individual with an autosomal recessive condition each carry one copy of the mutated gene, but they typically do not show signs and symptoms of t...
How is hereditary geniospasm inherited? Hereditary geniospasm is inherited in an autosomal dominant manner. This means that having only one mutated copy of the causative gene in each body cell is sufficient to cause signs and symptoms of the condition. When an individual with an autosomal dominant condition has childre...
Cancer prevention clinical trials are used to study ways to prevent cancer. Cancer prevention clinical trials are used to study ways to lower the risk of developing certain types of cancer. Some cancer prevention trials are conducted with healthy people who have not had cancer but who have an increa...
What causes pityriasis rubra pilaris? In most cases, pityriasis rubra pilaris (PRP) occurs sporadically for unknown reasons. In a few families with the inherited form, familial PRP, the condition is caused by mutations in the CARD14 gene. This gene gives instructions for making a protein that turns on other proteins th...
Mutations in the PTPN11, RAF1, or BRAF genes cause multiple lentigines syndrome. Approximately 90 percent of individuals with multiple lentigines syndrome have mutations in the PTPN11 gene. RAF1 and BRAF gene mutations are responsible for a total of about 10 percent of cases. A small proportion of people with multiple ...
Periodic fever, aphthous stomatitis, pharyngitis, cervical adenitis (PFAPA) is a periodic disease, which is a heterogeneous group of disorders characterized by short episodes of illness that regularly recur for several years alternated with healthy periods. PFAPA is characterized by high fevers lasting three to six day...
Malakoplakia is a rare chronic inflammatory disease. It commonly involves the urinary tract, but may also involve the prostate, ureter, pelvis, bones, lungs, testes, gastrointestinal tract, skin, and kidney. Malakoplakia of the kidney is often associated with chronic kidney infection and obstruction. E. coli is the m...
Summary : Arsenic is a natural element found in soil and minerals. Arsenic compounds are used to preserve wood, as pesticides, and in some industries. Arsenic can get into air, water, and the ground from wind-blown dust. It may also get into water from runoff. You may be exposed to arsenic by - Taking in smal...
The most common symptom of microscopic colitis is chronic, watery, nonbloody diarrhea. Episodes of diarrhea can last for weeks, months, or even years. However, many people with microscopic colitis may have long periods without diarrhea. Other signs and symptoms of microscopic colitis can include - a st...
Essential pentosuria occurs almost exclusively in individuals with Ashkenazi Jewish ancestry. Approximately 1 in 3,300 people in this population are affected.
Experts have not yet found a way to prevent Whipple disease.
What are the signs and symptoms of Hairy palms and soles? The Human Phenotype Ontology provides the following list of signs and symptoms for Hairy palms and soles. If the information is available, the table below includes how often the symptom is seen in people with this condition. You can use the MedlinePlus Medical D...
Scientists are evaluating new and improving current treatments for myasthenia gravis. Different drugs are being tested, either alone or in combination with existing drug therapies, to see if they are effective in treating the disorder. One study seeks to understand the molecular basis of synaptic transmission in the ne...
Fetal hydantoin syndrome is a disorder that is caused by exposure of a fetus to phenytoin, a drug commonly prescribed for epilepsy. Not all infants exposed to phenytoin will be affected with the disorder. Symptoms in affected individuals may include abnormalities of the skull and facial features, growth deficiencies, u...