ANTERIOR DECOMPRESSION AND RECONSTRUCTION IN COMPRESSIVE CERVICAL SPONDYLOTIC MYELOPATHY.

Abstract

Summary: Twenty six consecutive patients with CSM were operated between Jan 2001–Dec 2004 with anterior corpectomy and reconstruction using strut graft/ lordotic cage and stabilization ACP. 10/26 were wheel chair bound/bought on stretcher. 16/26 had spastic lower limbs with myelopathic hands. Post operatively 20/26 had good gait improvement and are community ambulators. 3/26 house hold ambulators and 1 died. 18/26 had good improvement in hand function.

Introduction: Cervical spondylotic myelopathy is a degenerative disease of old age. Patients present with severe disabiling symptoms of spastic gait/inability to walk and varied involvement in the hand. The degenerative spondylosis being the commonest cause, CSM is also caused by OPLL and soft disc herniation.

Methods: 26 consecutive patients who had undergone anterior decompression and reconstruction were evaluated for recovery. The gait pattern, hand functions and return to activities were evaluated pre and postoperatively. No specific scoring system could be used in our studies due to practical reasons.

Results: 18/26 patients had CSM, 5/26 had OPLL and 3/26 soft disc herniations. Soft disc herniation were at 2 levels and all underwent discectomy, tricortical bone grafting and stabilization with ACP. Other patients had corpectomy 1 level – 4, 2 levels – 9, 3 levels – 4, 4 levels – 1. OPLL was removed in 4/5 patients. Xx/10 patients who were wheel chair bound preoperatively became ambulatory, 3/10 had decrease in spasm but still could not walk postoperatively. At 1 year follow up 9/10 patients had good gait pattern and 1 was still wheel chair bound. 18/26 had good hand function recovery with improvement in hand writing, 16/26 returned to previous activity, 1 patient expired.

Conclusion: Anterior decompression for CSN is an effective surgical option. It not only prevents further detoriation, but also improvement is seen in most of the patients.

Significance: Anterior decompression is indicated for all patients with CSM, OPLL and disc herniation as the pathology is anterior based.