Rare case of retroperitoneal mitotically active leiomyoma in a postmenopausal woman. - Doita, Susumu; Taniguchi, Fumitaka; Mouri, Kengo; Miyake, Eiki; Hatono, Minami; Kajioka, Hiroki; Ogawa, Toshihiro; Watanabe, Megumi; Arata, Takashi; Katsuda, Kou; Tanakaya, Kouji; Aoki, Hideki (Journal of Surgical Case Reports, 2023)