Avascular necrosis of the patella following total knee replacement.
D000368:Aged; D005260:Female; D006801:Humans; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D010020:Osteonecrosis / Q000209:etiology*; D010329:Patella / Q000000981:diagnostic imaging / Q000473:pathology*; D011183:Postoperative Complications / Q000000981:diagnostic imaging; D011859:Radiography; D012086:Reoperation