Malignant non-chromaffin paraganglioma of the retroperitoneum.
D000368:Aged; D006801:Humans; D008297:Male; D010236:Paraganglioma, Extra-Adrenal / Q000175:diagnosis* / Q000473:pathology; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis* / Q000473:pathology