In young patients with Legg-Perthes disease, previously defined prognostic roentgenographic features do not correlate with long-term functional outcome.
Roentgenographic features warrant caution in Legg-Perthes prognostic counseling; challenges established indicators and leaves open superior predictors.
Thirty-one patients (with forty involved hips) in whom Legg-Perthes disease developed when they were less than five years old were reviewed. Previously defined roentgenographic features of prognostic significance were measured. Long-term follow-up (average, 129 months) allowed statistical testing of factors previously thought to be of significance in predicting outcome. Many of these patients were found to have poor results as measured roentgenographically. In addition, many prognostic indications were found not to be independent measures and of those demonstrating independence, none correlated with the functional outcome.
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C. Harrison Snyder (1975) studied this question.
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