[Malignant Brenner's tumor of the ovary: description of a case].

A case of malignant Brenner tumor (MBT) in a 42-year-old woman is described. According to the literature it is evident how rare this type of MBT is as well as the histogenetic problems arising in this neoplasia deriving from the coelomic epithelium. The malignant histologic criteria are those adopted in 1973 by Hull and Combell who showed as unquestionable signs the association of benign and malignant Brenner tumor, the invasion of the stroma on behalf of the malignant Brenner elements and the absence of mucinous cystadenoma or the association with the above mentioned.