Atypical fibroxanthoma arising in an area of syringocystadenoma papilliferum associated with nevus sebaceus: positivity of the atypical fibroxanthoma component for CD31.

The occurrence of an atypical fibroxanthoma in association with a syringocystadenoma papilliferum is reported. Both neoplasms showed characteristic histologic features and displayed typical immunohistochemical profiles. The neoplasms developed in intimate admixture in an area of nevus sebaceus.