Alprazolam: A benzodiazepine sedative that causes dose-related depression of the central nervous system. Alprazolam is useful in treating anxiety, panic attacks, insomnia, and muscle spasms. The brand name is Xanax. A generic version is available.
ALPS: Autoimmune lymphoproliferative syndrome. ALPS is caused by genetic mutation most often in the FAS gene. It is characterized by non-malignant proliferations of lymphoid tissue resulting in enlargement of lymph nodes and liver and sometimes the spleen- which can result in hypersplenism- a condition in which a large spleen too actively filters the blood, lowering […]
- Aicardi syndrome
Aicardi syndrome: A genetic disorder characterized by the partial or complete agenesis of the corpus callosum (the structure that links the 2 hemispheres of the brain), infantile spasms (a characteristic form of childhood seizures), mental retardation, and an ocular (eye) abnormality called chorioretinal lacunae in which there are lacunae (holes) in the retina of the […]
AHD: Abbreviation for alveolar hydatid disease; American Hospital Directory; and atherosclerotic heart disease.
- Alstrom syndrome
Alstrom syndrome: A progressive genetic disorder characterized by obesity, deafness, and visual problems in childhood and diabetes with insulin resistance (type 2 diabetes) and kidney failure in adulthood. Individuals with Alstrom syndrome have been identified in over 20 countries. Although the syndrome is generally rare, it is unusually frequent among Acadians, both those living in […]
- ALT (alanine aminotransferase)
ALT (alanine aminotransferase): An enzyme normally present in liver and heart cells that is released into the bloodstream when the liver or heart is damaged. The blood ALT levels are elevated with liver damage (for example, from viral hepatitis) or with an insult to the heart (for example, from a heart attack). Some medications can […]