Houston Methodist. Leading Medicine



In a freak accident I had a tree fall on my leg and dislocate my hip. I notice my knee really hurts too. The doctor couldn't find anything wrong during the exam. The X-ray is negative. Is there anything else that can be done to figure this out?


Knee injuries after a traumatic hip dislocation can be hard to diagnose. Injury or damage to the bone called bone bruising doesn't always show up on X-ray.

If there's no visible evidence of injury, painful symptoms may go away over time with healing. However, some damage may not be seen without an MRI.

A recent study of knee injuries in patients with traumatic hip dislocations showed a 93 percent rate of abnormality. Some were even in knees that weren't painful!

Magnetic resonance imaging (MRI) was used to find evidence of these additional soft tissue injuries. Knee injuries were divided equally between swelling, bone bruising, and meniscal tears.

Gary L. Schmidt, MD, et al. Knee Injury in Patients Experiencing a High-Energy Traumatic Ipsilateral Hip Dislocation. In The Journal of Bone and Joint Surgery. June 2005. Vol. 87-A. No. 6. Pp. 1200-1204.

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