Evaluation of the Behavior of Spinal Deformities in Tuberculosis of the Spine in Adults

ABSTRACT

STUDY DESIGN: A prospective clinical study. PURPOSE: The objective of the present study was to evaluate the behavior of spinal deformities in tuberculosis (TB) of the spine during the initial 2 years and to suggest remedial measures. OVERVIEW OF LITERATURE Spinal TB is the most common cause of a kyphotic deformity in many parts of the world. Treatment of the established deformity is difficult, hazardous and has a high complication rate. METHODS: We followed 50 adult patients treated for spinal TB for a minimum of 2 years. Average values of vertebral body height loss (VBL), deformity angle, kyphosis angle, and lumbosacral joint angle at the final follow-up were compared with the values at initial presentation. The relationship between the amount of initial VBL and final kyphotic angle was analyzed. RESULTS: Average values of VBL, deformity angle, kyphosis angle, and lumbosacral joint angle at initial presentation were 0.26, 12.51degrees, 2.26degrees, and 12.3degrees, respectively; and the corresponding values at the final follow-up were 0.7, 17.8degrees, 5.64degrees, and 10.8degrees, respectively. The increase was extremely significant for the deformity angle (initial vs. 6th month, p=0.000; 6th month vs. 24th month, p=0.000) and kyphotic angle (initial vs. 6th month, p=0.003; 6th month vs. 24th month, p=0.000) in the thoracic and thoracolumbar regions during the first 2 years of the disease process. The increase in the deformity angle in the lumbar region was significant only in the initial 6 months (p=0.01). We could not find any correlation between the initial VBL and the final kyphotic angle (r=0.302, p>0.05). CONCLUSIONS: Different regions of the vertebral column respond differently to bony destruction caused by spinal TB. Deformity progression is more significant during the initial 6 months of the disease process, and this may be the best time to take remedial measures to prevent development/progression of the deformity. Kyphotic deformity keeps increasing even after 6 months of antituberculous treatment, and it does not correlate with the initial VBL in adults.