HAIR FOLLICLE NEVUS - CASE-REPORT AND REVIEW

Hair follicle nevus has been variously defined as a specific type of n eoplasm with follicular differentiation or as a synonym for trichofoll iculoma; the latter view has predominated in recent years. We report a nodular lesion that was identified histopathologically as a hamartoma with follicular differentiation and that systematic serial sectioning showed not to be a trichofolliculoma. After reviewing previous descri ptions of lesions diagnosed as hair follicle nevus, and in the light o f our own observations, we believe that hair follicle nevus is a disti nct type of adnexal hamartoma.