Laneway 2025 Perthes Disease. Each stage of perthes disease has key indicators, which signifies the. Perthes' disease is a form of idiopathic osteonecrosis (or osteochondrosis) of the femoral head in childhood (1).

His affected leg has lost more than half of the femoral head and it has deteriorated past his growth plate. The hip joint is made up the round head of the thigh bone, also known as the femoral head,.