A clinical and histopathological study of nevus sebaceous

Objective: to study the clinical and histopathological features of nevus sebaceous (ns). methods: we selected 20 cases of nevus sebaceous for clinical and histopathological evaluation. results: regarding the clinical appearance of lesions verrucous plaques were seen in 60% patients, papules in 25% and patches in 15%. all of the lesions showed abortive/immature hair follicles characterized by cords of undifferentiated, basaloid cells resembling the embryonic stages of hair follicle. conclusion: ns is a hamartoma consisting of various elements indigenous to the organ and not merely the sebaceous units.