Ataxia-pancytopenia syndrome is a rare genetic disorder characterized by a combination of ataxia (lack of muscle coordination) and pancytopenia (low levels of all types of blood cells). It is caused by mutations in the gene encoding the enzyme ade...

Ataxia-photosensitivity-short stature syndrome (APSS) is a rare genetic disorder characterized by ataxia (lack of muscle coordination), photosensitivity (sensitivity to light), and short stature. It is caused by a mutation in the ATXN2 gene, which...

Ataxia-tapetoretinal degeneration syndrome (ATD) is a rare genetic disorder that affects the eyes and nervous system. It is characterized by progressive vision loss, ataxia (lack of muscle coordination), and retinal degeneration. Symptoms usually ...

Ataxia-telangiectasia variant (ATV) is a rare genetic disorder that is characterized by a combination of neurological and immunological symptoms. It is caused by a mutation in the ATM gene, which is responsible for the production of a protein that...

Ataxia-telangiectasia-like disorder (ATLD) is a rare genetic disorder that is characterized by progressive neurological problems, including ataxia (loss of muscle coordination), telangiectasia (dilated blood vessels), and immunodeficiency. It is c...

Atelencephaly is a rare and fatal neurological disorder that is characterized by the absence of a large portion of the brain, including the cerebrum and cerebellum. It is a type of anencephaly, a disorder in which the brain does not develop proper...

Atelosteogenesis type I is a rare genetic disorder that affects the development of bones in the body. It is caused by a mutation in the SLC26A2 gene, which is responsible for the production of a protein called anion exchanger 2. This protein is im...

Atelosteogenesis type II is a rare genetic disorder that affects the development of bones in the body. It is caused by a mutation in the SLC26A2 gene, which is responsible for the production of a protein called anion exchanger 2. This protein is i...

Atelosteogenesis type III is a rare genetic disorder that affects the development of bones in the body. It is caused by a mutation in the SLC26A2 gene, which is responsible for the production of a protein called anion exchanger 2. This protein is ...

Athabaskan brainstem dysgenesis syndrome (ABDS) is a rare genetic disorder that affects the development of the brainstem. It is characterized by a range of neurological symptoms, including hypotonia, developmental delay, seizures, and craniofacial...

OverviewArteriosclerosis occurs when the blood vessels that carry oxygen and nutrients from your heart to the rest of your body (arteries) become thick and stiff — sometimes restricting blood flow to your organs and tissues. Healthy art...

Arteriosclerosis occurs when the blood vessels that carry oxygen and nutrients from your heart to the rest of your body (arteries) become thick and stiff — sometimes restricting blood flow to your organs and tissues. Healthy arteries are fle...

Atherosclerosis-deafness-diabetes-epilepsy-nephropathy syndrome is a rare genetic disorder characterized by a combination of atherosclerosis (hardening of the arteries), deafness, diabetes, epilepsy, and nephropathy (kidney disease). It is caused ...

Athlete's foot, also known as tinea pedis, is a common fungal infection that affects the skin on the feet. It is caused by various types of fungi, most commonly Trichophyton rubrum. Athlete's foot is highly contagious and can be spread through dir...

Athyreosis is a rare medical condition in which the thyroid gland fails to develop properly during fetal development. It is characterized by the absence of the thyroid gland, which can lead to a variety of symptoms, including growth retardation, m...

Atkin-Flaitz syndrome is a rare genetic disorder characterized by intellectual disability, seizures, and facial abnormalities. It is caused by a mutation in the gene that codes for the enzyme dihydropyrimidine dehydrogenase (DPD). Symptoms of Atki...

Atopic dermatitis facts Atopic dermatitis is a type of eczema. The disease may be inherited and genetically determined. The patient's skin may be "super sensitive" to many irritants. Dry, scaly patches ...