Tuberculous spondylitis: analysis of 69 cases from Saudi Arabia

Abstract

Design: Retrospective chart and radiographic review of all cases admitted to the authors' hospital and diagnosed to have tuberculous spondylitis.

Objective: To identify the frequency, presenting features, utility of diagnostic tests, and treatment outcome of spinal tuberculosis in a tertiary care center.

Methods: All cases of spinal tuberculosis treated in the authors' hospital over 14 years were reviewed. Only those with histologic or microbiologic confirmation or those who responded to antituberculous spondylitis therapy were included. Outcome was assessed according to predefined criteria.

Results: Between 1985 and 1998, 69 cases of tuberculous spondylitis were found, i.e., 5% of all tuberculous spondylitis cases diagnosed. The mean age was 52.8 years (range, 15-80 years), and 37 (53.6%) were male. Only five patients had a history of tuberculosis. The most frequent symptoms were backache (84%) and fever (32%), and the most frequent sign was spinal tenderness (45%). Nineteen (28%) patients had paraparesis and 12 (17%) had kyphosis. Except for elevated sedimentation rate (94.5%), the laboratory workup was not helpful. Both computed tomography and magnetic resonance imaging were found to be helpful in diagnosis, often with complementary information. Thirty-eight patients (55%) had thoracic spine involvement and 55 patients (80%) had paraspinal abscesses. Tissue aspirates had a yield of 70%, 35%, and 57% for granulomas, acid-fast bacilli smear, and culture, respectively. Medical therapy alone was given in 37 cases (54%), whereas 32 patients (46%) required additional surgical intervention, mainly those with spinal cord compression, spinal deformity, or risk of spinal instability. There was definite improvement in 63 cases (91%). The best outcome was in those patients presenting early before the occurrence of spinal deformity or neurologic symptoms.

Conclusion: Tuberculous spondylitis is prevalent in the authors' hospital. Both computed tomography and magnetic resonance imaging are extremely helpful for diagnosis, and tissue aspirate is a good confirmatory method. A good outcome is expected if the diagnosis is made in early stages before the appearance of spinal deformity and neurologic symptoms. Surgical intervention can be avoided in these cases regardless of the presence or absence of paraspinal abscesses.