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- results from failure of the upper femoral epiphysis, which allows displacement of the femoral head on the femoral neck
- onset may be sudden, but more often is gradual
- pain frequently is referred to the knee, but can also occur in the hip
- limp and out-toeing are common, with loss of medial hip rotation
- majority of patients are 7-15 years old, and are aboce the 95th percentile for weight
- AP or frog-leg lateral xrays of the hip are diagnostic
References
Baskin MN. Injury-knee. In:Fleisher GR, Ludwig S, eds. Textbook of Pediatric Emergency Medicine. 4th ed. Philadelphia, Pa: Lippincott Williams & Wilkins; 2000:339-347
Staheli LT. Hip. In: Fundamentals of Pediatric Ortopoedics. 2nd ed. Philadelphia, Pa: Lippincott-Raven; 1998:68-71.