Apocrine hidrocystoma on the nipple: the first report in this unusual location.

Apocrine hidrocystoma is a rare, benign, cystic tumor of the apocrine sweat glands. They are most commonly located around the eyes and may also be found on the scalp and neck. However, despite the fact that the nipple and areola contain numerous apocrine sweet glands, apocrine hydrocystomas have not been described previously in this area to the best of our knowledge. We report the first case of this cyst in this unsual location.