A tumour that constitutes < 2% of ovarian tumours, which presents at age 50, and is variably accompanied by hyperestrinism. Most Brennar tumours are benign; some borderline, and fewer are frankly malignant.
Further subtyping and histopathological analysis of these 4 major ovarian tumour categories is as follows: Out of the 38 surface epithelial origin cancers, 18 (29.51%) cases were serous cyst adenocarcinomas, 14 cases (22.95%) were mucinous cystadenocarcinomas, 4 cases (6.56%) were endometrioid cancers and there was 1 case (1.64%) each of malignant Brenner tumour and mixed mullerian tumour (Table 4).
Other less common ovarian cancers included papillary cyst adenocarcinoma (3 cases), clear cell carcinoma (2 cases) and malignant Brenner tumour (2 cases).
In one study the differential diagnosis of a calcified adnexal mass usually include a degenerative uterine or intra-ligamentous myoma of an ovarian tumour such as fibrothecoma, Brenner tumour and mature or immature teratoma .