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If acute diarrhea lasts 2 days or less, diagnostic tests are usually not necessary. If diarrhea lasts longer or is accompanied by symptoms such as fever or bloody stools, a doctor may perform tests to determine the cause. Diagnostic tests to find the cause of diarrhea may include the following: ...
These resources address the diagnosis or management of Christianson syndrome: - Genetic Testing Registry: Christianson syndrome - MedlinePlus Encyclopedia: Seizures These resources from MedlinePlus offer information about the diagnosis and management of various health conditions: - Diagnostic Tests - Drug Therapy...
The severe forms of hypophosphatasia that appear early in life are inherited in an autosomal recessive pattern. Autosomal recessive inheritance means that two copies of the gene in each cell are altered. Most often, the parents of an individual with an autosomal recessive disorder each carry one copy of the altered gen...
Barotrauma means injury to your body because of changes in barometric (air) or water pressure. One common type happens to your ear. A change in altitude may cause your ears to hurt. This can happen if you are flying in an airplane, driving in the mountains, or scuba diving. Divers can also get decompression sickness, w...
Chromosome 5q deletion is a chromosome abnormality that occurs when there is a missing copy of the genetic material located on the long arm (q) of chromosome 5. The severity of the condition and the signs and symptoms depend on the size and location of the deletion and which genes are involved. Features that often occu...
These resources address the diagnosis or management of glucose-6-phosphate dehydrogenase deficiency: - Baby's First Test - Genetic Testing Registry: Glucose 6 phosphate dehydrogenase deficiency - MedlinePlus Encyclopedia: Glucose-6-phosphate dehydrogenase deficiency - MedlinePlus Encyclopedia: Glucose-6-phosphate d...
The National Institute of Neurological Disorders and Stroke (NINDS), a part of the National Institutes of Health (NIH), conducts and supports research about Niemann-Pick disease through research grants to research institutions across the country. Investigators at the NINDS have identified two different genes that, when...
The abdominal cavity is the internal area of the body between the chest and hips that contains the lower part of the esophagus, stomach, small intestine, and large intestine. The esophagus carries food and liquids from the mouth to the stomach, which slowly pumps them into the small and large intestines. Abdominal adhe...
Orthostatic hypotension is a sudden fall in blood pressure that occurs when a person assumes a standing position. It is due to a lesion of the baroreflex loop, which senses a change in blood pressure and adjusts heart rate and activates sympathetic nerve system fibers to cause the blood vessels to narrow and correct bl...
These resources address the diagnosis or management of NFJS/DPR: - Foundation for Ichthyosis and Related Skin Types (FIRST): Palmoplantar Keratodermas - Genetic Testing Registry: Dermatopathia pigmentosa reticularis - Genetic Testing Registry: Naegeli-Franceschetti-Jadassohn syndrome - MedlinePlus Encyclopedia: Ect...
What causes MECP2 duplication syndrome? MECP2 duplication syndrome occurs when there is an extra copy (duplication) of the MECP2 gene in each cell. This is generally caused by a duplication of genetic material located on the long (q) arm of the X chromosome. The size of the duplication can vary; however, this does not ...
What causes fibrolamellar carcinoma? The exact underlying cause of fibrolamellar carcinoma (FLC) is poorly understood. Other forms of liver cancer are often associated with liver cirrhosis (scarring of the liver) which may be caused by alcohol abuse; autoimmune diseases of the liver; Hepatitis B or C viral infections; ...
The National Institute of Neurological Disorders and Stroke (NINDS) and other institutes of the National Institutes of Health (NIH) support research related to congenital myasthenia through grants to major research institutions across the country. Much of this research focuses on finding better ways to prevent, treat a...
Responsive prevention and treatment of migraine is incredibly important. Evidence shows an increased sensitivity after each successive attack, eventually leading to chronic daily migraine in some individuals With proper combination of drugs for prevention and treatment of migraine attacks most individuals can overcome ...
Aicardi-Goutieres syndrome is an inherited condition that mainly affects the brain, immune system, and skin. It is characterized by early-onset severe brain dysfunction (encephalopathy) that usually results in severe intellectual and physical disability. Additional symptoms may include epilepsy, painful, itchy skin les...
There is no standard treatment for megalencephaly. Treatment will depend upon the disorder with which the megalencephaly is associated and will address individual symptoms and disabilities.
Mutations in the PNKD gene cause familial paroxysmal nonkinesigenic dyskinesia. The function of the protein produced from the PNKD gene is unknown; however, it is similar to a protein that helps break down a chemical called methylglyoxal. Methylglyoxal is found in alcoholic beverages, coffee, tea, and cola. Research ha...
The prevalence of isolated ectopia lentis is unknown. In Denmark, an estimated 6.4 per 100,000 individuals have ectopia lentis, but a large proportion of these cases (about 75 percent) are syndromic.
Most cases of Langer-Giedion syndrome are not inherited, but occur as random events during the formation of reproductive cells (eggs or sperm) in a parent of an affected individual. These cases occur in people with no history of the disorder in their family. There have been very few instances in which people with Lange...
Intestinal pseudo-obstruction symptoms may include - abdominal swelling or bloating, also called distension - abdominal pain - nausea - vomiting - constipation - diarrhea Over time, the condition can cause malnutrition, bacterial overgrowth in the intestines, and weight loss. Maln...
This condition is inherited in an autosomal dominant pattern from an affected parent; one copy of the altered gene in each cell is sufficient to cause the disorder.
What are the signs and symptoms of pachygyria? Signs and symptoms of pachygyria vary among affected people and can depend on the extent of the abnormality. They often include poor muscle tone and motor function; seizures; developmental delays; intellectual disability; failure to grow and thrive; difficulties with feedi...
Cephalic disorders are congenital conditions that stem from damage to or abnormal development of the budding nervous system. Most cephalic disorders are caused by a disturbance that occurs very early in the development of the fetal nervous system. Damage to the developing nervous system is a major cause of chronic, dis...
What causes Alport syndrome? Alport syndrome may be caused by mutations in either the COL4A3, COL4A4, or COL4A5 genes. These genes each provide instructions for making one component of a protein called type IV collagen, which plays an important role in the glomeruli of the kidneys. Glomeruli are clusters of specialized...
Autosomal recessive hypotrichosis can be caused by mutations in the LIPH, LPAR6, or DSG4 gene. These genes provide instructions for making proteins that are involved in the growth and division (proliferation) and maturation (differentiation) of cells within hair follicles. These cell processes are important for the nor...
Pulmonary alveolar microlithiasis is caused by mutations in the SLC34A2 gene. This gene provides instructions for making a protein called the type IIb sodium-phosphate cotransporter, which plays a role in the regulation of phosphate levels (phosphate homeostasis). Although this protein can be found in several organs an...
Arachnoiditis is adisorder that causes chronic pain and neurological deficits and does not improve significantly with treatment.Surgery may only provide temporary relief. The outlook for someone witharachnoiditis iscomplicated by the fact that the disorder has no predictable pattern or severity of symptoms.
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.
Chromosome 8q deletion is a chromosome abnormality that occurs when there is a missing copy of the genetic material located on the long arm (q) of chromosome 8. The severity of the condition and the signs and symptoms depend on the size and location of the deletion and which genes are involved. Features that often occu...
PDGFRA-associated chronic eosinophilic leukemia is not inherited and occurs in people with no history of the condition in their families. Mutations that lead to a PDGFRA fusion gene and PDGFRA point mutations are somatic mutations, which means they occur during a person's lifetime and are found only in certain cells. S...
A heritable disease is caused by a mutation, or harmful change, in a gene inherited from a parent. Genes are small structures in your body's cells that determine how you look and tell your body how to work. Examples of heritable diseases are Huntington's disease, sickle cell anemia, and muscular dystrophy. Most disease...
Adenosine monophosphate (AMP) deaminase deficiency is a condition that can affect the muscles used for movement (skeletal muscles). People with this condition do not make enough of an enzyme called AMP deaminase. In most people, AMP deaminase deficiency does not cause any symptoms. People who do experience symptoms typ...
Perniosis are itchy and/or tender red or purple bumps that occur as a reaction to cold. In severe cases, blistering, pustules, scabs and ulceration may also develop. Occasionally, the lesions may be ring-shaped. They may become thickened and persist for months. Perniosis is a form of vasculitis. Signs and symptoms occu...
A poison is any substance that is harmful to your body. You might swallow it, inhale it, inject it, or absorb it through your skin. Any substance can be poisonous if too much is taken. Poisons can include - Prescription or over-the-counter medicines taken in doses that are too high - Overdoses of illegal drugs...
These resources address the diagnosis or management of Ohdo syndrome, Maat-Kievit-Brunner type: - Genetic Testing Registry: Ohdo syndrome, X-linked These resources from MedlinePlus offer information about the diagnosis and management of various health conditions: - Diagnostic Tests - Drug Therapy - Surgery and Re...
What causes myotonic dystrophy? Myotonic dystrophy is caused by mutations called nucleotide repeat expansions in either the DMPK gene (in type 1) or the CNBP gene (in type 2). Nucleotide repeat expansions occur when a piece of DNA is abnormally repeated a number of times, which makes the gene unstable. In myotonic dyst...
Axenfeld-Rieger syndrome is a group of eye disorders that affects the development of the eye. Common eye symptoms include cornea defects, which is the clear covering on the front of the eye, and iris defects, which is the colored part of the eye. People with this syndrome may have an off-center pupil (corectopia) or ex...
Treatment for NPH involves surgical placement of a shunt in the brain to drain excess CSF into the abdomen where it can be absorbed as part of the normal circulatory process. This allows the brain ventricles to return to their normal size. Regular follow-up care by a physician is important in order to identify subtle c...
The estimated incidence of X-linked thrombocytopenia is between 1 and 10 per million males worldwide; this condition is rarer among females.
How is relapsing polychondritis diagnosed? There are no tests available that are specific for relapsing polychondritis (RP). A diagnosis is, therefore, generally based on the presence of characteristic signs and symptoms. For example, people may be diagnosed as having RP if they have three or more of the following feat...
Hidradenitis suppurativa (HS) is a chronic skin disease. It can occur in one or multiple areas of your body. HS usually develops in your armpits, groin, and anal area. It causes long-term skin inflammation and can be painful. Symptoms include - Blackheads and red, tender bumps, called abscesses. The abscesse...
Signs of melanoma include a change in the way a mole or pigmented area looks. These and other signs and symptoms may be caused by melanoma or by other conditions. Check with your doctor if you have any of the following: - A mole that: - changes in size, shape, or color. - has irregular edges...
LOC syndrome is a rare disorder that primarily affects families of Punjabi background from India and Pakistan, although the condition has also been reported in one family from Iran.
Color vision deficiency (sometimes called color blindness) represents a group of conditions that affect the perception of color. Red-green color vision defects are the most common form of color vision deficiency. Affected individuals have trouble distinguishing between some shades of red, yellow, and green. Blue-yellow...
What are the signs and symptoms of Red cell phospholipid defect with hemolysis? The Human Phenotype Ontology provides the following list of signs and symptoms for Red cell phospholipid defect with hemolysis. If the information is available, the table below includes how often the symptom is seen in people with this cond...
What are the signs and symptoms of Familial congenital fourth cranial nerve palsy? The Human Phenotype Ontology provides the following list of signs and symptoms for Familial congenital fourth cranial nerve palsy. If the information is available, the table below includes how often the symptom is seen in people with thi...
These resources address the diagnosis or management of Fabry disease: - Baby's First Test - Gene Review: Gene Review: Fabry Disease - Genetic Testing Registry: Fabry disease These resources from MedlinePlus offer information about the diagnosis and management of various health conditions: - Diagnostic Tests - Dr...
What are the signs and symptoms of cryptogenic organizing pneumonia? Signs and symptoms of cryptogenic organizing pneumonia (COP) vary but may include: Persistent nonproductive cough Difficult or labored breathing Fever Malaise Weight loss Hemoptysis (rare)
What are the signs and symptoms of Familial multiple trichodiscomas? The Human Phenotype Ontology provides the following list of signs and symptoms for Familial multiple trichodiscomas. If the information is available, the table below includes how often the symptom is seen in people with this condition. You can use the...
Mutations in the ATP7A gene cause Menkes syndrome. The ATP7A gene provides instructions for making a protein that is important for regulating copper levels in the body. Copper is necessary for many cellular functions, but it is toxic when present in excessive amounts. Mutations in the ATP7A gene result in poor distribu...
Alzheimer's disease (AD) is the most common form of dementia among older people. Dementia is a brain disorder that seriously affects a person's ability to carry out daily activities. AD begins slowly. It first involves the parts of the brain that control thought, memory and language. People with AD may have trouble...
The term hemangioendothelioma describes several types of vascular neosplasms and includes both non-cancerous (benign) and cancerous (malignant) growths. The term has also been applied to those that show "borderline" behavior, intermediate between entirely benign hemangiomas and highly malignant angiosarcomas. Hemangioe...
The causes of Goodpasture syndrome are not fully understood. People who smoke or use hair dyes appear to be at increased risk for this condition. Exposure to hydrocarbon fumes, metallic dust, and certain drugs, such as cocaine, may also raise a persons risk. Genetics may also play a part, as a small number of cases hav...
The prognosis for individuals with WS varies. Some degree of impaired intellect is found in most people with the disorder. Some adults are able to function independently, complete academic or vocational school, and live in supervised homes or on their own; most live with a caregiver. Parents can increase the likelihood...
What are the signs and symptoms of Choroidal dystrophy central areolar? The Human Phenotype Ontology provides the following list of signs and symptoms for Choroidal dystrophy central areolar. If the information is available, the table below includes how often the symptom is seen in people with this condition. You can u...
Lipoic acid synthetase deficiency is a rare condition that affects the mitochondria. Mitochondria are tiny structures found in almost every cell of the body. They are responsible for creating most of the energy necessary to sustain life and support growth. People affected by this condition generally experience early-on...
Lattice corneal dystrophy type I is caused by mutations in the TGFBI gene. This gene provides instructions for making a protein that is found in many tissues throughout the body, including the cornea. The TGFBI protein is part of the extracellular matrix, an intricate network that forms in the spaces between cells and ...
How might catamenial pneumothorax be treated? Treatment of choice is with surgery, with video-assisted thoracoscopic surgery (VATS). Conventional thoracotomy may be occasionally necessary, particularly in repeat operations. It is very important to examine the large, thin tissue lining around the outside of the lungs an...
How is dwarfism diagnosed? Some types of dwarfism can be identified through prenatal testing if a doctor suspects a particular condition and tests for it. However, most cases are not identified until after the child is born. In those instances, the doctor makes a diagnosis based on the child's appearance, failure to gr...
Maternally inherited diabetes and deafness (MIDD) is a form of diabetes that is often accompanied by hearing loss, especially of high tones. The diabetes in MIDD is characterized by high blood sugar levels (hyperglycemia) resulting from a shortage of the hormone insulin, which regulates the amount of sugar in the blood...
What causes Laron syndrome? Laron syndrome is caused by changes (mutations) in the GHR gene. This gene encodes growth hormone receptor, which is a protein found on the outer membrane of cells throughout the body. Growth hormone receptor is designed to recognize and bind growth hormone, which triggers cellular growth an...
Beckwith-Wiedemann syndrome affects an estimated 1 in 13,700 newborns worldwide. The condition may actually be more common than this estimate because some people with mild symptoms are never diagnosed.
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.
Mutations in the FLNA gene cause otopalatodigital syndrome type 1. The FLNA gene provides instructions for producing the protein filamin A, which helps build the network of protein filaments (cytoskeleton) that gives structure to cells and allows them to change shape and move. Filamin A binds to another protein called...
Bobble-head doll syndrome (BHDS) is a rare neurological condition that is typically first seen in childhood. The signs and symptoms of BHDS include characteristic up and down head movements that increase during walking and excitement and decrease during concentration. Although the specific cause of this condition is un...
Lattice corneal dystrophy type 3A is rare condition that affects the cornea. It is characterized primarily by protein clumps in the clear, outer covering of the eye which cloud the cornea and impair vision. Affected people also experience recurrent corneal erosion (separation of certain layers of the cornea), which is ...
Therapies for POTS are targeted at relieving low blood volume or regulating circulatory problems that could be causing the disorder. No single treatment has been found to be effect for all. A number of drugs seem to be effective in the short term. Whether they help in long term is uncertain. Simple interventions such a...
How is tracheobronchomalacia diagnosed? A diagnosis of tracheobronchomalacia (TBM) may be suspected based on the presence of characteristic signs and symptoms or abnormal pulmonary function tests. Additional testing such as CT scan and bronchoscopy can then be performed to confirm the diagnosis and evaluate the severit...
Doctors may prescribe a variety of medications to treat the non-motor symptoms of Parkinson's disease, such as depression and anxiety. Hallucinations, delusions, and other psychotic symptoms may be caused by some drugs prescribed for Parkinson's. Therefore, reducing or stopping those Parkinson's medications may make th...
Epidermolysis bullosa simplex is usually inherited in an autosomal dominant pattern, which means one copy of the altered gene in each cell is sufficient to cause the disorder. Some affected people inherit the mutation from one affected parent. Other cases result from new mutations in the gene and occur in people with n...
Most cases of osteogenesis imperfecta have an autosomal dominant pattern of inheritance, which means one copy of the altered gene in each cell is sufficient to cause the condition. Many people with type I or type IV osteogenesis imperfecta inherit a mutation from a parent who has the disorder. Most infants with more se...
Adenosine deaminase (ADA) deficiency is an inherited disorder that damages the immune system and causes severe combined immunodeficiency (SCID). People with SCID lack virtually all immune protection from bacteria, viruses, and fungi. They are prone to repeated and persistent infections that can be very serious or life-...
The prevalence of erythromelalgia is unknown.
What causes stiff person syndrome? Scientists dont yet understand what causes stiff person syndrome, but research indicates that it is the result of an abnormal autoimmune response in the brain and spinal cord. Most people with stiff person syndrome have antibodies to glutamic acid decarboxylase (GAD), a protein in som...
What causes Barrett esophagus? The exact underlying cause of Barrett esophagus is unknown. However, certain factors are known to increase the risk of developing the condition. These include: Long-standing gastroesophageal reflux disease (GERD) Obesity (specifically high levels of belly fat) Smoking Factors that may dec...
What are the signs and symptoms of Sabinas brittle hair syndrome? The Human Phenotype Ontology provides the following list of signs and symptoms for Sabinas brittle hair syndrome. If the information is available, the table below includes how often the symptom is seen in people with this condition. You can use the Medli...
Y chromosome infertility is a condition that affects the production of sperm, making it difficult or impossible for affected men to father children. An affected man's body may produce no sperm cells (azoospermia), a smaller than usual number of sperm cells (oligospermia), or sperm cells that are abnormally shaped or th...
De Barsy syndrome is a rare genetic disorder characterized mainly by a prematurely aged-looking face (progeria); cloudy corneas; short stature; and intellectual disability. Affected individuals can have a wide variety of other signs and symptoms, including loose skin folds due to reduced elasticity (cutis laxa); poor m...
Most cases of Wolff-Parkinson-White syndrome occur in people with no apparent family history of the condition. These cases are described as sporadic and are not inherited. Familial Wolff-Parkinson-White syndrome accounts for only a small percentage of all cases of this condition. The familial form of the disorder typi...
These resources address the diagnosis or management of 17-beta hydroxysteroid dehydrogenase 3 deficiency: - Genetic Testing Registry: Testosterone 17-beta-dehydrogenase deficiency - MedlinePlus Encyclopedia: Ambiguous Genitalia - MedlinePlus Encyclopedia: Intersex These resources from MedlinePlus offer information...
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.
Hives are red and sometimes itchy bumps on your skin. An allergic reaction to a drug or food usually causes them. Allergic reactions cause your body to release chemicals that can make your skin swell up in hives. People who have other allergies are more likely to get hives than other people. Other causes include infect...
The kidneys are two bean-shaped organs, each about the size of a fist. They are located just below the rib cage, one on each side of the spine. Every day, the kidneys filter about 120 to 150 quarts of blood to produce about 1 to 2 quarts of urine. Healthy kidneys produce a hormone called erythropoietin...
DICER1 syndrome is inherited in an autosomal dominant pattern, which means one copy of the altered gene is sufficient to cause the disorder. It is important to note that people inherit an increased risk of tumors; many people who have mutations in the DICER1 gene do not develop abnormal growths.
These resources address the diagnosis or management of asphyxiating thoracic dystrophy: - Genetic Testing Registry: Asphyxiating thoracic dystrophy 2 - Genetic Testing Registry: Asphyxiating thoracic dystrophy 4 - Genetic Testing Registry: Asphyxiating thoracic dystrophy 5 - Genetic Testing Registry: Jeune thoracic...
These resources address the diagnosis or management of heterotaxy syndrome: - Boston Children's Hospital: Tests for Heterotaxy Syndrome - Gene Review: Gene Review: Primary Ciliary Dyskinesia - Genetic Testing Registry: Atrioventricular septal defect, partial, with heterotaxy syndrome - Genetic Testing Registry: Het...
How might familial Mediterranean fever (FMF) be treated? Currently, there is no known cure for FMF. Physicians can only treat the symptoms of the disease. A common therapy for FMF is daily use of the drug colchicine, a medicine that reduces inflammation. Many people require colchicine for life. This therapy has been su...
Even with the best of care, children with Tay-Sachs disease usually die by age 4, from recurring infection.
Mutations in the NYX and CACNA1F genes cause the complete and incomplete forms of X-linked congenital stationary night blindness, respectively. The proteins produced from these genes play critical roles in the retina. Within the retina, the NYX and CACNA1F proteins are located on the surface of light-detecting cells c...
Biological therapy is a treatment that uses a person's own immune system to fight leukemia. This therapy uses special substances to stimulate the immune system's ability to fight cancer. Some patients with chronic lymphocytic leukemia receive monoclonal antibodies, which are man-made proteins that can identify leukemia...
What are the signs and symptoms of Pseudopelade of Brocq? The Human Phenotype Ontology provides the following list of signs and symptoms for Pseudopelade of Brocq. 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...
Infantile-onset ascending hereditary spastic paralysis is caused by mutations in the ALS2 gene. This gene provides instructions for making the alsin protein. Alsin is produced in a wide range of tissues, with highest amounts in the brain, particularly in motor neurons. Alsin turns on (activates) multiple proteins calle...
The prevalence of MCAP is unknown. At least 150 affected individuals have been reported in the medical literature. Because the condition is often thought to be misdiagnosed or underdiagnosed, it may be more common than reported.
Aniridia occurs in 1 in 50,000 to 100,000 newborns worldwide.
Carney complex is a rare disorder; fewer than 750 affected individuals have been identified.
These resources address the diagnosis or management of SYNGAP1-related intellectual disability: - Eunice Kennedy Shriver National Institute of Child Health and Human Development: What Are Treatments for Intellectual and Developmental Disabilities? - Genetic Testing Registry: Mental retardation, autosomal dominant 5 ...
Myotonia is a chronic disorder. Symptoms may improve later in life.
Majeed syndrome is a rare condition characterized by recurrent episodes of fever and inflammation in the bones and skin. One of the major features of Majeed syndrome is an inflammatory bone condition known as chronic recurrent multifocal osteomyelitis (CRMO). This condition causes recurrent episodes of pain and joint ...
PHA2 is a rare condition; however, the prevalence is unknown.
Older people with alcohol problems respond to treatment as well as younger people. Some studies suggest that older adults do better when they are treated with other people the same age instead of mixed in with younger adults. Some communities have treatment programs and support groups specifically for older adults.