Acquired heterotopic ossification in hips and knees following encephalitis: case study

Heterotopic ossification(HO) is a potential complication following severe head injury, spinal injury, nontraumatic intracranial lesion and long-term coma. Post-encephalitis HO is rare and literature revealed that most of this rare cases are major with one or two anatomical regions affected. We present a 47-year-old man with HO in the bilateral hips and bilateral knees that prevented him from walking following after being attacked by encephalitis as the case study. The management of HO is controversial. After surgical excision, reconstruction of the medial collateral ligament and pharmacotherapy of Celecoxib after operation, he regained mobility of the joints. On review of X-ray, there was no recurrence of HO and no loose of rivets which were used in the reconstruction of medial collateral ligament.HO in the bilateral hip-joints and bilateral knee-joints associated with encephalitis have never been reported previously.