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PROGNOSIS OF FRACTURE AND DISLOCATION OF THE SPINE AT THORACOLUMBAR JUNCTION: A REVIEW OF 12 CASES



Abstract

Thoracolumbar junction of the spinal column is the common site of spinal trauma and is often complicated by neurological dysfunction. From 1997 to 2000, there were 12 patients surgically stabilized. 8 of them were victims of major trauma while the rest was after a trivial fall in osteoporotic spine. Lengthen of follow-up ranged from 6 to 42 months.

Ages of the patients in the major trauma group were from 22 to 65. Except the one who had anterior approach because of multiple level lesions, all fractures after major trauma were initially relocated and stabilized posteriorly. Subsequent anterior procedures were necessary in three of them because of significant residual spinal canal stenosis. All except one had satisfactory lower limb function on follow up. Two patients who were paralysed on admission were able to walk independently and 4 others had improved by at least one Frankel grade. Return of neurological function was usually observed within the first week after the procedure. Residual sphincter dysfunction was however, a common problem.

The management of four osteoporotic spinal fractures in thoracolumbar junction was more unpredictable. Patients were from 66 to 92 years old. Anterior decompression was often performed because of the presence of retropulsed fragment. Although some improvement of lower limb function could be achieved, rehabilitation in three of them was complicated by loss of reduction or failure of the implant.

Recovery of the neurological function in the lower limbs was found to have no correlation with the amount of stenosis of the spinal canal. Most of the damage occurred probably at the time of injury. The sphincter control was most difficult to rehabilitate after an insult to the conus medullaris.

The abstracts were prepared by Professor Jegan Krishnan. Correspondence should be addressed to him at the Flinders Medical Centre, Bedford Park 5047, Australia.