Papillary apocrine fibroadenoma of the vulva.

An unusual papillary tumour of the vulva is described which exhibits apocrine features, as currently defined. The tumour has areas which resemble sclerosing adenosis of the breast and also exhibits mucinous and sebaceous differentiation. A review of the literature reveals a small number of similar lesions of the vulva. Many of these have been classified as lesions of ectopic breast tissue. In the absence of associated normal breast lobules it is impossible to differentiate these from lesions arising from apocrine sweat glands. This papillary apocrine fibroadenoma may represent a distinct cutaneous tumour occurring in this site.