ペルテス病における“Head at Risk”出現例の予後

抄録

In this study, forty-four cases (forty-six hips) of Perthes' disease treated by varus osteotomy from 1975 to 1985 were studied radiologically to investigate the incidence of the “Head at risk” signs and the correlation between the signs and the prognosis of this disease. The radiological result of the femoral head was evaluated by Mose's criteria after a minimum follow-up period of three years after diagnosis.
Among the five of “Head at risk” signs, “Gage's sign”, “Calcification lateral to the epiphysis”, and “Diffuse metaphyseal change” were seen in nine, ten, and ten hips, respectively out of forty-six hips. Other two signs were undetectable because of varus ostetomy.
The cases with no risk signs proved to have good radiological results. There was an increasing incidence of a poor radiological result with an increasing number of the risk signs. “Diffuse metaphyseal change” had a high risk for the poor result.