Case report 111.
D000293:Adolescent; D001845:Bone Cysts / Q000000981:diagnostic imaging*; D003937:Diagnosis, Differential; D005266:Femoral Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D006801:Humans; D008297:Male; D012516:Osteosarcoma / Q000000981:diagnostic imaging* / Q000473:pathology; D011859:Radiography