Syringocystadenoma papilliferum (Q83948)

Syringocystadenoma papilliferum is a skin hamartoma, which is believed to derived from apocrine sweat glands or, less often, from eccrine sweat glands. Three clinical types have been described. The plaque type presents mostly as a hairless area in the scalp, often in association with a sebaceous nevus of Jadassohn; the linear type, which is usually seen on the neck or face, and the solitary nodular type, which shows predilection for the trunk.