Thoracic disk herniation and recurrent dislocation of total hip prosthesis.

We have described a patient who had thoracic disk herniation, recurrent dislocation of a total hip prosthesis, and heterotopic ossification. The recurrent dislocation resulted from spasticity from a spinal lesion, but the treatment focused on technical solutions related to the hip. Evaluation for total hip arthroplasty should include careful neurologic examination. If recurrent dislocation occurs, spasticity from an occult lesion should be considered. Resection of calcified thoracic disks should be approached with caution.