Extraovarian Brenner tumor in the uterus: a case report and review of literature oleh Rui-Yue Hu, Yan-Juan Deng, Hao-Hao Zhu, Jing Zhou, Ming Hu, Xiao-Qing Liang, Qiu-Jin Xiao, Lv Zhou, Xiao-Yu Peng, Xing-Wei Zhang, Ning Ji, Huan Deng