Extraovarian Brenner tumor coexisting with serous cystadenoma. Case report.

Only rare cases of extraovarian Brenner tumors have been described. This report concerns one case of extraovarian Brenner tumor detected in close association with an extraovarian benign serous cystadenoma. Coexistence of these two tumors supports the theory of a common origin either from celomic epithelium or remnants of the embryonic mesonephric system.