title: Case report 270. Diagnosis: alveolar sarcoma of soft parts (malignant non-chromaffin paraganglioma).
mesh_terms: D000293:Adolescent; D001706:Biopsy; D005266:Femoral Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D005269:Femur / Q000473:pathology; D006801:Humans; D008297:Male; D010236:Paraganglioma, Extra-Adrenal / Q000000981:diagnostic imaging* / Q000473:pathology; D011859:Radiography