[Trichoadenoma (Nikolowski). A clinical and histologic case report]

"Trichoadenoma," which was described by Nikolowsky 25 years ago as an organoid follicular hamartoma, is today an independent and internationally recognized entity. On the basis of observations in one of our own cases, the clinical picture of trichoadenoma, its histogenesis and its position in the periodic system of the follicular nevi and tumors are discussed. In general, it deals with an benign growth, as so far no malignant transformation has been described. No decision has been made so far as to whether the trichoadenoma is a benign follicular tumor, a hamartoma or a follicular nevus.