Nevus sebaceus in a 30-year-old man. The plaque has developed in to a large verrucous yellow-pink nodule with a decrease in terminal scalp hair.

This 12-year-old boy has reached puberty, and the lesion has become thicker. This change at puberty is expected and represents, in part, sebaceous gland and epithelial hyperplasia.

Nevus sebaceus occurs most often on the scalp, although lesions are also found on the face, neck, and trunk.