Diagnosis of Hair Loss: Clinical features of common causes of hair loss.

The document from 1992 discussed the clinical features of common causes of hair loss. The common causes identified were androgenic hair loss, alopecia areata, trichotillomania, tinea capitis, telogen effluvium, and traction alopecia. The author also discussed the distinguishing clinical features of these common alopecias and those of less common ones. No specific study size or numeric data was provided in the summary.