title: [Retroperitoneal dedifferentiated liposarcoma: a case report].
abstract: A 64 year-old female visited our outpatient clinic with left dull flank pain. The ultrasonography and CT scans showed the large solid mass in 12 cm in maximum diameter, containing large area of fatty element, in the left retroperitoneal space. Under the diagnosis of retroperitoneum liposarcoma, the mass and left kidney was completely removed. Pathological examination revealed the dedifferentiated liposarcoma which contained the distinct two patterns of well differentiated lipoma and dedifferentiated fibrotic sarcomatoid tissue.
authors.affiliation: Department of Urology, Tokyo Medical University, Tokyo, Japan.
authors.forename: Tatsuo
authors.initials: T
authors.lastname: Gondo
authors.forename: Makoto
authors.initials: M
authors.lastname: Ohori
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Nakagami
authors.forename: Noboru
authors.initials: N
authors.lastname: Sakamoto
authors.forename: Masaaki
authors.initials: M
authors.lastname: Tachibana
mesh_terms: D005260:Female; D006801:Humans; D008080:Liposarcoma / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D008875:Middle Aged; D011859:Radiography; D012186:Retroperitoneal Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D014463:Ultrasonography