title: Retroperitoneal mixed-type liposarcoma showing features of four different subtypes.
abstract: Mixed-type liposarcoma is a rare soft tissue tumor. This report describes a 50-year-old man with retroperitoneal mixed-type liposarcoma that consisted of four pathologically different components. Preoperative CT and MRI showed a giant retroperitoneal mass composed of several nodules with various attenuation and signal intensity. At laparotomy, the tumor appeared to be composed of four components. Pathologic examination revealed that each component was of a histologically different subtype. Mixed-type liposarcoma containing four different subtypes is extremely rare. Its clinical and pathologic features are briefly reviewed.
authors.affiliation: Department of Surgery, Ome Municipal General Hospital, Tokyo, Japan. hosaka-a@umin.ac.jp
authors.forename: Akihiro
authors.initials: A
authors.lastname: Hosaka
authors.forename: Yukiyoshi
authors.initials: Y
authors.lastname: Masaki
authors.forename: Kazuki
authors.initials: K
authors.lastname: Yamasaki
authors.forename: Fumio
authors.initials: F
authors.lastname: Aoki
authors.forename: Katsuyoshi
authors.initials: K
authors.lastname: Sugizaki
authors.forename: Eisaku
authors.initials: E
authors.lastname: Ito
mesh_terms: D006801:Humans; D008080:Liposarcoma / Q000175:diagnosis / Q000473:pathology* / Q000601:surgery; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis / Q000473:pathology* / Q000601:surgery; D014057:Tomography, X-Ray Computed