Hypotrichosis simplex due to a short anagen phase Q84.0

Barraud-Klenovsek MM et al., 2000

Probably autosomal dominant inherited hypotrichosis, which becomes evident in childhood and is based on a disorder in the course of the hair cycle with a shortened anagen phase.

Normal length hair at birth. The hair does not grow longer than a few centimetres in early childhood. A visit to the hairdresser is not necessary. The children described so far were strikingly blond. The hair itself shows a reduced diameter.

The trichogram shows the pattern of a diffuse telogen effluvium with frontally and occipitally increased telogen rate (Barraud-Klenovsek MM et al. 2000).

Hypotrichosis hereditaria simplex; loose anagen hair; alopecia areata diffusa

A therapy is not possible, but also not necessary.

In contrast to other forms of hereditary hypotrichosis, "hypotrichosis simplex due to a short anagen phase" normalizes hair growth until adulthood.

1. Barraud-Klenovsek MM et al (2000) Congential hypotrichosis due to short anagen. Br J Dermatol 143: 612-617