Loose Anagen Syndrome (LAS)
Loose Anagen Syndrome (LAS) is a self-limiting condition where anagen hairs are easily and painlessly pulled out by the patient. It is reported more in childhood; although it may present in adulthood as well. The presence of anagen hair devoid of its sheath and with ‘floppy appearance’ is characteristic of loose anagen hair (LAH) on trichogram. LAH can be seen in normal population and in alopecia areata. In LAS, LAH is more than 50%. The histopathological findings show splitting between the layers of hair which differentiates LAS from alopecia areata.