Osteonecrosis of the knee--radiographic observations.
D000368:Aged; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007592:Joint Diseases / Q000150:complications / Q000000981:diagnostic imaging* / Q000473:pathology; D007719:Knee Joint; D008297:Male; D008875:Middle Aged; D009336:Necrosis / Q000000981:diagnostic imaging; D010003:Osteoarthritis / Q000209:etiology; D011859:Radiography