title: So-called recurrent Perthes' disease.
mesh_terms: D002675:Child, Preschool; D006801:Humans; D007873:Legg-Calve-Perthes Disease / Q000000981:diagnostic imaging / Q000628:therapy; D008297:Male; D010007:Osteochondritis / Q000000981:diagnostic imaging; D011859:Radiography; D012008:Recurrence