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Alopecia areata

Definition

Alopecia areata is hair loss of unknown cause, characterized by round patches of complete baldness.

Alternative Names

Alopecia totalis; Alopecia universalis

Causes

The specific cause of alopecia areata is unknown. A family history of alopecia is present in about a fifth of all cases. Alopecia areata is occasionally associated with autoimmune diseases.

Alopecia may also occur as alopecia totalis with complete loss of scalp hair or as alopecia universalis with total loss of all body hair.

Review Date: 10/26/2006
Reviewed By: Michael S. Lehrer, M.D., Department of Dermatology, University of Pennsylvania Medical Center, Philadelphia, PA. Review provided by VeriMed Healthcare Network.

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