- Etiology: idiopathic avascular necrosis of femoral head epiphysis
- Imaging: early see microfracture / subarticular lucency = crescent sign, later see fragmentation of femoral head / subchondral cysts / coxa magna/coxa plana = flat / enlarged femoral head + femoral neck shortening
- Complications: early osteoarthritis
- Clinical: seen in ~ 4-8 year old while slipped capital femoral epiphysis is seen in 13 year old, bilateral in 10-20% and if bilateral usually affected sucessively, not simultaneously
Radiology Cases of Legg-Calve-Perthes-Disease
