A clinicopathologic study was made of 16 cases of trichotillomania, and some statistical data are presented which have been gathered through questionnaires from 100 dermatologists. Histopathology of trichotillomania was found to be characteristic and permitted differentiation from other forms of hair loss.
Mehregan AH. TrichotillomaniaA Clinicopathologic Study. Arch Dermatol. 1970;102(2):129-133. doi:10.1001/archderm.1970.04000080001001