Abstract
Retrospective case series. The aim of this study was to investigate the clinical outcomes >10 years following laminoplasty and pedicle screw fixation for cervical myelopathy associated with athetoid cerebral palsy (CP). Surgery for cervical myelopathy associated with CP remains a challenge because of perioperative instrumentation failure and adjacent segment problems due to patients' repetitive involuntary neck movements with deformity of the cervical spine. A single-center series of 14 patients were reviewed. The patients comprised seven women and seven men with a mean age of 52 years at the time of surgery. The mean follow-up period was 12.5 years. The Barthel index (BI), which shows independence in activities of daily life, and Japanese Orthopaedic Association (JOA) score were assessed. Radiographic evaluation included changes of the C2-C7 angle in the sagittal plane, fusion rate, adjacent segment degeneration, and instrument failure. The 10-year BI and JOA score significantly improved at 36% and 31%, respectively. The preoperative Cobb angle of the sagittal plane from C2-C7 measured 11.9° of kyphosis, which improved to 0.8° of lordosis. In the radiographic analysis, 35% (proximal) and 21% (distal) of the adjacent segment showed progression in degeneration of more than one grade after 10 years. More than 90% of the patients who underwent magnetic resonance imaging showed progressive disc degeneration on either side after 10 years. Autofusion inside the disc or anterior vertebral bony bridging was observed in 86% of intervertebral levels without anterior procedures. The procedure showed favorable initial stability and maintained favorable clinical outcomes in patients with CP. More than 90% of the patients showed disc degeneration on either side. The rate of proximal adjacent segment degeneration was higher than that of distal segments with or without symptoms at the >10-year follow-up. 4.
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