Which finding is most indicative of a dislocated hip?

• A. Shortened leg with external rotation
• B. Pain with weight-bearing
• C. Normal hip range of motion
• D. Numbness in foot

Answer: (A)

Dislocation of the hip produces a dramatic deformity that is highly characteristic. When the femoral head is displaced from the acetabulum, the leg commonly appears shortened and lies in an externally rotated position. This visible change—shortened limb with external rotation—is a highly specific sign of a dislocated hip in the trauma setting, making it the most indicative finding.

Pain with weight-bearing can occur with many injuries and isn’t unique to hip dislocation. Normal hip range of motion wouldn’t fit a dislocation, since the joint is displaced and movement is usually severely limited or impossible. Numbness in the foot may reflect nerve involvement but isn’t specific to hip dislocation and can arise from other injuries as well.