An apparent loose body in the knee. A diagnostic problem in childhood.
D002648:Child; D003937:Diagnosis, Differential; D006801:Humans; D007717:Knee / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D007718:Knee Injuries / Q000000981:diagnostic imaging*; D008297:Male; D011859:Radiography; D013977:Tibia / Q000000981:diagnostic imaging