Larsen-Johanson disease. Osteochondritis of the accessory ossification center of the patella. Report of two cases.
D000293:Adolescent; D002648:Child; D003937:Diagnosis, Differential; D050723:Fractures, Bone / Q000175:diagnosis; D006801:Humans; D007718:Knee Injuries / Q000175:diagnosis; D008297:Male; D009069:Movement Disorders / Q000209:etiology; D010007:Osteochondritis / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000453:epidemiology; D010146:Pain; D010329:Patella / Q000000981:diagnostic imaging; D011859:Radiography; D012146:Rest