THE LOOSE anagen hair syndrome (LAS) is a sporadic or familial hair disorder that primarily affects children but may occasionally be seen in adults.1- 8 The condition is due to a defective anchorage of the hair shaft to the follicle, resulting in easily and painlessly pluckable hair. Patients with LAS complain of slow-growing hair and diffuse or patchy alopecia. The clinical manifestations of the disorder are in most cases mild, and it is likely that only a small proportion of children with the condition seek dermatological advice.
Tosti A, Piraccini BM. Loose Anagen Hair Syndrome and Loose Anagen Hair. Arch Dermatol. 2002;138(4):521-522. doi:10.1001/archderm.138.4.521