Hair That Does Not Grow: Loose Anagen Hair Syndrome Versus Short Anagen Hair Syndrome - Abstract
Loose anagen hair syndrome (LAHS) is a hair disorder that is caused by defective anchorage of the hair shaft to the follicle and primarily affects children. Diagnosis is made clinically by painless plucking of hair that does not grow long and confirmed by a trichogram with distrophic anagen hairs. Short anagen hair syndrome (SAHS) is another hair condition in which anagen phase has a short duration and as a result, patients present with very short hair and often complain of increased shedding. In this second pathology, pull test shows extraction of telogen hairs with a pointed tip. Both of these diseases must be considered in pediatric patients that present with a complaint of hair that does not grow long.