title: Well-differentiated liposarcoma of the retroperitoneum with a fat-fluid level: US, CT, and MR appearance.
abstract: We report a case of retroperitoneal liposarcoma with a fat-fluid level that has not been previously described. A 36-year-old man presented with abdominal distension. Ultrasonography, CT, and MR imaging showed a tumor with a fat-fluid level; nondependent fluid was characteristic of fat. Liposarcoma should be included in the differential diagnosis of tumors exhibiting a fat-fluid level.
authors.affiliation: Department of Radiology, Institute of Clinical Medicine, University of Tsukuba, Tsukuba-shi, Ibaraki-ken 305, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Kurosaki
authors.forename: Y O
authors.initials: YO
authors.lastname: Tanaka
authors.forename: Y
authors.initials: Y
authors.lastname: Itai
mesh_terms: D000273:Adipose Tissue / Q000000981:diagnostic imaging / Q000473:pathology; D000328:Adult; D003937:Diagnosis, Differential; D005122:Exudates and Transudates; D006801:Humans; D008080:Liposarcoma / Q000175:diagnosis* / Q000000981:diagnostic imaging; D008279:Magnetic Resonance Imaging; D008297:Male; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging; D013724:Teratoma / Q000175:diagnosis; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography