Angiostrongyliasis is a parasitic infection caused by the roundworm Angiostrongylus cantonensis. It is also known as rat lungworm and is most commonly found in rodents, such as rats, and other animals, such as snails and slugs. Humans can become i...

Angora hair nevus is a rare skin condition characterized by the presence of fine, silky, and often curly hair on the face, neck, and upper chest. It is caused by an abnormal growth of hair follicles in the affected area. The condition is usually p...

Angular cheilitis, also known as perleche, is a common inflammatory condition that affects the corners of the mouth. It is characterized by redness, cracking, and sometimes painful sores at the corners of the lips. The condition can be caused by a...

Anhidrotic ectodermal dysplasia-immunodeficiency-osteopetrosis-lymphedema syndrome (AEO) is a rare genetic disorder characterized by a combination of ectodermal dysplasia, immunodeficiency, osteopetrosis, and lymphedema. Ectodermal dysplasia is a ...

Aniridia is a rare genetic disorder that affects the eyes. It is characterized by the partial or complete absence of the iris, the colored part of the eye. People with aniridia may experience decreased vision, sensitivity to light, and increased r...

Aniridia Cerebellar Ataxia Mental Deficiency (ACAMD) is a rare genetic disorder characterized by the absence of the iris of the eye (aniridia), ataxia (poor coordination), mental deficiency, and other neurological problems. It is caused by a mutat...

Aniridia-absent patella syndrome is a rare genetic disorder characterized by the absence of the iris of the eye (aniridia), the absence of the kneecap (patella), and other physical abnormalities. It is caused by a mutation in the PAX6 gene, which ...

Aniridia-intellectual disability syndrome is a rare genetic disorder that affects the eyes and the brain. It is characterized by the absence of the iris (the colored part of the eye) and intellectual disability. Other symptoms may include vision p...

Aniridia-ptosis-intellectual disability-familial obesity syndrome is a rare genetic disorder characterized by the presence of aniridia (absence of the iris of the eye), ptosis (drooping of the upper eyelid), intellectual disability, and familial o...

Aniridia-renal agenesis-psychomotor retardation syndrome (ARP) is a rare genetic disorder characterized by the absence of the iris of the eye (aniridia), the absence of one or both kidneys (renal agenesis), and delayed development of physical and ...

Anisakiasis is a parasitic infection caused by eating raw or undercooked fish or seafood that contains larvae of the Anisakis worm. Symptoms of anisakiasis include abdominal pain, nausea, vomiting, and diarrhea. In some cases, the larvae can cause...

Anisocoria is a condition in which the pupils of the eyes are different sizes. It is usually harmless and can be caused by a variety of factors, including medications, eye trauma, and neurological disorders....

ANK3-related intellectual disability-sleep disturbance syndrome is a rare genetic disorder caused by mutations in the ANK3 gene. It is characterized by intellectual disability, sleep disturbances, and other neurological features such as seizures, ...

Ankyloblepharon filiforme adnatum-cleft palate syndrome (AFA-CP) is a rare genetic disorder characterized by the fusion of the eyelids, cleft palate, and other facial abnormalities. It is caused by a mutation in the TP63 gene, which is responsible...

Ankyloblepharon filiforme adnatum-imperforate anus syndrome (AFA-IA) is a rare genetic disorder characterized by the fusion of the eyelids, imperforate anus, and other physical anomalies. It is caused by a mutation in the TP63 gene. Symptoms may i...

Ankyloblepharon-ectodermal defects-cleft lip/palate syndrome (AEC syndrome) is a rare genetic disorder characterized by the presence of ankyloblepharon (fusion of the eyelids), ectodermal defects (abnormalities of the skin, hair, nails, and teeth)...