The heterotopic ossification is one of the complications of spinal cord or brain injury and is not life threatening but can be disabling. In most cases the hip joint is involved and occurs in the connective tissue of skeletal muscle close to a joint.

It's major problem is the restricted motion of the joint. But, femoral nerve entrapment by heterotopic ossification is rarely reported.

We experienced one case of femoral nerve entrapment by heterotopic ossification in a patient with recurrent cerebral vascular accident and reported the case with clinical, radiologic, and electrodiagnostic findings.