title: Case 89: Retroperitoneal extraskeletal osteosarcoma.
authors.affiliation: Department of Radiology, Dokuz Eylul University Faculty of Medicine, 35340 Inciralti, Izmir, Turkey. mustafa.secil@deu.edu.tr
authors.forename: Mustafa
authors.initials: M
authors.lastname: Secil
authors.forename: Ugur
authors.initials: U
authors.lastname: Mungan
authors.forename: Kutsal
authors.initials: K
authors.lastname: Yorukoglu
authors.forename: Oguz
authors.initials: O
authors.lastname: Dicle
mesh_terms: D000368:Aged; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D012516:Osteosarcoma / Q000175:diagnosis*; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis*; D014057:Tomography, X-Ray Computed