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.