Cerebriform Intradermal Nevus: A Case of Scalp Expansion on the Galea

We report here a 7‐year‐old Japanese girl with cerebriform intradermal nevus (CIN). By placement of expanders on the galea, her scalp was expanded more easily with less discomfort than is expected when the expanders are placed under the galea. An immunohis‐tochemical study on the expression of proliferating cell nuclear antigen suggested higher proliferative activity of nevus cells from the CIN lesion than that of cells from congenital or acquired intradermal nevi. The high proliferative activity appeared to be associated with a growth spurt of the lesion.