Evaluation and diagnosis of the hair loss patient: part II. Trichoscopic and laboratory evaluations

Abstract

The use of trichoscopy for evaluating a number of hair and scalp disorders is gaining popularity. It is a simple and noninvasive in vivo tool for visualizing hair shafts and the scalp. Recently, alopecias have been classified according to their trichoscopic findings. The second part of this 2-part continuing medical education article reviews recent advances in this field and describes a systematic approach for using the differential diagnostic findings of trichoscopy in alopecia.

Keywords: alopecia areata; androgenetic alopecia; dermatoscopy; dermoscopy; discoid lupus erythematosus; dissecting cellulitis; lichen planopilaris; patterned hair loss; trichoscopy; videodermatoscopy.