Basal cell carcinoma and infundibuloma arising in separate sebaceous nevi during childhood.

Sebaceous nevi usually occur as solitary hamartomas, located either on the scalp or on the face. Their clinical importance in dermatology stems from their propensity to develop secondary tumors, particularly basal cell carcinoma. In general, malignant transformation does not occur until postpubertal life. We report a case of a 9-year-old girl with a basal cell carcinoma arising from a sebaceous nevus on the scalp, and an infundibuloma arising from a separate sebaceous nevus on the right side of the face.