Alopecia

**Semantic type:** Disease or Syndrome

**Definition:** Hair loss usually from the scalp. It may result in bald spots or spread to the entire scalp or the entire epidermis. It may be androgenetic or caused by chemotherapeutic agents, compulsive hair pulling, autoimmune disorders or congenital conditions.

**Synonyms:** - Alopecia Areata - Hair Loss - Hair Loss - Hair Loss - alopecia