Cystic Endometrioma with Coexisting Fibroma Originating in a Supernumerary Ovary in the Rectovaginal Pouch oleh Daiki Ogishima, Asumi Sakaguchi, Hiroko Kodama, Kanako Ogura, Ayako Miwa, Yayoi Sugimori, Shozo Matuoka, Toshiharu Matsumoto