ABSTRACT
A 21-year-old man presented with a solitary 14x10cm sized slightly elevated firm plaque with partial hair loss on the right parietal scalp, which he had had since birth. Histopathologic examination revealed typical findings of congenital intradermal nevus. As a preoperative procedure a 300cc capacity crescentic expander was placed under the uninvolved scalp. Inflation and expansion of uninvolved left parietal scalp with saline over a 10-week period allowed excision of a 14x10 cm sized area of medium-sized congenital intradermal nevus. No hematoma or infection of the expanded skin occurred. We, herein, report an unusual case of diffuse congenital, nonpigmented, intradermal nevus with partial alopecia on the scalp, which was successfully treated with complete excision used by tissue expander.