RT Book, Section A1 Ritter, Kathryn A1 Fitch, Robert Warne A2 Knoop, Kevin J. A2 Stack, Lawrence B. A2 Storrow, Alan B. A2 Thurman, R. Jason SR Print(0) ID 1181043718 T1 Legg-Calvé-Perthes Disease T2 The Atlas of Emergency Medicine, 5e YR 2021 FD 2021 PB McGraw-Hill PP New York, NY SN 9781260134940 LK accessmedicine.mhmedical.com/content.aspx?aid=1181043718 RD 2024/04/18 AB Legg-Calvé-Perthes disease is idiopathic avascular necrosis of the femoral head due to disruption of blood flow. It typically occurs in children aged 4 to 10 years and is more common in males. Patients typically present with hip pain and a limp, which is exacerbated by activity. Legg-Calvé-Perthes may be diagnosed on radiographs. X-rays may show widening of the cartilage space or a subchondral stress fracture. If left untreated, this will progress to femoral head deformity and subluxation from the acetabulum.