Hidradenoma papilliferum with mixed histopathologic features of syringocystadenoma papilliferum and anogenital mammary-like glands.

A case of hidradenoma papilliferum with mixed features of syringocystadenoma papilliferum (SCAP) and anogenital mammary-like glands is reported. A single, fresh red-colored nodule developed in the sulcus between the labia majora and minora of a 49-year-old Japanese woman. Histopathologically, the tumor showed epithelial lining with apocrine secretion and slight connective tissues characteristics.