Terminal Hairs That Resemble Occipital Hairs in Pilonidal Sinus Disease: A Case Report.

This is the first demonstrated case in which terminal hairs that resembled occipital hairs and ranged from 2 to 13 cm in length were extracted from a patient with primary pilonidal sinus disease. This case provides evidence that occipital hairs may enter the pilonidal sinus and perhaps also play a role in the pathogenesis of the disease.