title: [Retroperitoneal malignant fibrous histiocytoma: a new case].
mesh_terms: D018219:Histiocytoma, Benign Fibrous / Q000175:diagnosis*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis*; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography
vernacular_title: Histiocitoma fibroso maligno retroperitoneal: un nuevo caso.