The authors describe a benign adenomatous neoplasm arising from anogen
ital mammary-like glands. These glands have been recently recognized i
n the anogenital region and may play an important role in the developm
ent of some neoplastic disorders peculiar to this anatomical area. Imp
ortant features of the tumor are adenomatous tubular and cystic struct
ures with apocrine-like cytologic features, a lobular configuration, a
nd abundant fibrous stroma.