Knee injuries in traumatic hip dislocation.

Of 187 patients treated at the author's institutions for fracture and/or dislocation of the hip during a 10-year period (1985-1994), 46 patients (25%) with a knee injury on the same side as the hip injury were evaluated 6 months to 11 years after the initial accident (mean, 3.65 years). Thirty-nine patients (85%) had symptoms or clinical signs in the knee. Ligamentous injuries overlooked in the initial examination were found in seven patients. Knee injuries often accompany hip fracture and/or dislocation, and can be produced by direct or indirect trauma. A delayed diagnosis of such injuries may lead to their treatment in the sequela phase, which complicates the final outcome. Therefore, an exhaustive physical examination is recommended for patients with traumatic hip dislocation to detect potential injuries to the ipsilateral knee. Early diagnosis and treatment of such injuries greatly improve final outcome.