[Brenner's tumor of the ovary].

A retrograde analysis of surgically treated women for ovarian tumours in the last 20 years was performed. Out of a total of 1741 such patients, only 4 developed Brenner tumour (0.23%). Three of them were in the fifth decade and one in the eighth decade of life. All these four tumours were unilateral. Three of them were benign and one "proliferating". One patient had a mucinous cystadenoma in the other ovary and one a malignant cystadenocarcinoma in the same ovary with the benign Brenner tumour. Two patients had an atrophic endometrium and two had adenomatoid, i.e. atypical hyperplasia. The size of tumours varied from 2 to 20 cm in diameter.