title: Metastasizing retroperitoneal fibroxanthoma (malignant fibroxanthoma).
mesh_terms: D000368:Aged; D001344:Autopsy; D005354:Fibrosarcoma / Q000473:pathology*; D006651:Histocytochemistry; D006801:Humans; D008207:Lymphatic Metastasis; D008297:Male; D009362:Neoplasm Metastasis; D012186:Retroperitoneal Neoplasms / Q000473:pathology*