Acquired immunodeficiency syndrome
AIDS. AIDS is a disease due to infection with the human immunodeficiency virus (HIV). Also referred to as acquired immunodeficiency disease.
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- Acquired mutation
Acquired mutation: A genetic change that occurs in a single cell after the conception of an individual. That change is then passed along to all cells descended from that cell. Acquired mutations are involved in the development of cancer.
- Acrocentric chromosome
Acrocentric chromosome: A chromosome in which the centromere is located quite near one end of the chromosome. Humans normally have five pairs of acrocentric chromosomes. Down syndrome is caused by an extra acrocentric chromosome (chromosome21).
- Acrocephalosyndactyly
Acrocephalosyndactyly: An inherited disorder causing abnormalities of the skull and face and the hands and feet. In acrocephalosyndactyly there is closure too-early of some of the sutures of the skull (craniosynostosis). This results in an abnormally shaped head, which is unusually tall and peaked, and an abnormally shaped face with shallow eye sockets and underdevelopment […]
- Acrochordon
Acrochordon: A small tag of skin that may have a stalk (a peduncle). An acrochordon may appear on skin anywhere although the favorite locales are the eyelids, neck, armpits (axillae), upper chest, and groin. Invariably benign, this tiny tumor of the skin usually causes no symptoms unless repeatedly irritated as, for example, by the collar. […]
- Acrocyanosis
Acrocyanosis: Blueness of the hands and feet, usually due to inadequate circulation.