Syringocystadenoma papilliferum of the scalp.

Syringocystadenoma papilliferum is a rare, benign adnexal tumor of eccrine or apocrine origin that typically presents at birth or before puberty. Syringocystadenoma papilliferum is associated with a nevus sebaceus in about 40% of cases. We present a 50-year old woman with a pink-orange plaque and nodule on the scalp, consistent with syringocystadenoma papilliferum that arose within a nevus sebaceus.