Neurogenic Heterotopic Ossification of the Hip after Brain Injury. Function Recovery Preserving Hip Joint: A Case Report.

Introduction: Up to 30% of patients with spinal cord injury and to 20% of patients with traumatic brain injury develop neurogenic heterotopic ossification (NHO). Patients develop restriction in joint range of motion (ROM) and impairment in activities of daily life. When neurological recovery occurs, joints dysfunction represents the cause for patients' autonomy loss.

Case Report: We present the case of a 39-year-old Caucasian male involved in a car accident and experienced 14 days of post-traumatic coma. After rehabilitation, no residual motor or sensory neurological deficit was present, but bilateral NHOs surrounding hip joints developed. Seventeen months after trauma, the patient was admitted to our institute. He was confined to bed, absolutely unable to walk, stand or sit. Radiological evaluation consisted in Antero-Posterior X-ray view only, due to the inability to open up his hips for lateral views, and 3D computed tomography scan. "Functional resection" of the ossifications was performed and rehabilitation started from day 1 after surgery. At the final follow-up 24 months from the second operation high grade of clinical satisfaction was reported. The patients were able to walk independently, to put on his socks, and to drive a car and bike. Painless right and left hip ROM was, respectively, 100° and 90° for flexion, 10° for extension, 35° and 30° for abduction, and near normal internal and external rotation. The patient referred that further improvement in mobility and fluency was still present day by day.

Conclusion: The rarity of the condition frequently bring to a delay in treatment and the absence of specific guidelines made treatment still dependent on surgeon experiences. A multidisciplinary approach is essential for success. Surgeons should be aware that it is important to refer patients to specialized center, because early resection could provide excellent results, preserving hip, and restoring function and patient independency.