title: Retroperitoneal malignant fibrous histiocytoma: case report and literature review.
mesh_terms: D001707:Biopsy, Needle; D005347:Fibroblasts / Q000473:pathology; D006644:Histiocytes / Q000473:pathology; D018219:Histiocytoma, Benign Fibrous / Q000473:pathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012186:Retroperitoneal Neoplasms / Q000473:pathology*