Natural history, classification, and x-ray signs in Legg-Calvé-Perthes' disease.
D002648:Child; D002675:Child, Preschool; D005260:Female; D005271:Femur Head Necrosis / Q000000981:diagnostic imaging*; D006801:Humans; D007873:Legg-Calve-Perthes Disease / Q000145:classification / Q000000981:diagnostic imaging* / Q000628:therapy; D008297:Male; D011379:Prognosis; D011859:Radiography