Retroperitoneal Liposarcoma with Multilocular Cysts. - Chika Komine; Minoru Fukuchi; Shinji Sakurai; Yuichi Tabe; Akihiko Sano; Kana Saito; Takaharu Fukasawa; Hideki Yamamoto; Masachika Tani; Hiroshi Naitoh; Hiroshi Saeki; Ken Shirabe (Case Reports in Gastroenterology, 2019)