Cutaneous ciliated cyst of the scalp. A case report with immunohistochemical evidence for estrogen and progesterone receptors.

The cutaneous ciliated cyst (CCC) is an unusual lesion found in young women that typically occurs on the lower extremities. This report describes a case of CCC arising in the scalp, a previously undescribed anatomic location for this lesion. In addition, positive nuclear staining for estrogen and progesterone receptors is demonstrated by immunohistochemical methods. Possible pathogenetic mechanisms are discussed.