Ankylosing Pelvitrochanteric Heterotopic Ossification in a Patient with Spinal Tuberculosis

Heterotopic ossification (HO) is defined as the presence of lamellar bone at locations where bone normally does not exist. This syndrome is most commonly seen following neurological disorders such as traumatic brain or spinal cord injury, or following joint surgery or severe burns. Patients with neurogenic HO develop lesions around larger joints. The hip is the most common location, followed by the knees and elbows but complete ankylosis is a rare presentation. Radiation therapy, surgical rese ction, biphosphonates and various non - steroidal anti - inflammatory drugs (NSAIDs) have been reported and advocated as efficacious methods for management of HO. We report a case of ankylosing pelvitrochanteric HO in a patient with spinal tuberculosis (TB) tr eated successfully with surgical excision, postoperative radiation therapy and indomethacin.