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Background: Tuberculous spondylitis can be difficult to distinguish from alternative spinal pathologies such as malignancy, particularly if the imaging features are not typical. Biopsy and histopathological analysis are facilitative to the early and accurate diagnosis of atypical tuberculous spondylitis and the clinical management. The purpose of this study is to describe some of the atypical imaging features of tuberculous spondylitis diagnosed by image-guided percutaneous biopsy, as well as associated treatment outcomes.
Methods: We performed a retrospective analysis of all patients diagnosed with tuberculous spondylitis after image-guided percutaneous biopsy at The Third Affiliated Hospital of Southern Medical University between 2013 and 2020. Of the patients identified, those with atypical imaging features were selected for case review. All patients were given anti-tuberculous medication treatment with or without surgery. The imaging features, histological and microbiological results, and clinical presentations and outcomes were evaluated. Neurological function was evaluated according to the Frankel grading system. The clinical outcomes were evaluated by Visual Analogic Scale (VAS) scores for pain, imaging [X-ray, computed tomography (CT), and magnetic resonance imaging (MRI)] results, and laboratory examinations. Comparison of VAS scores was made by Student test.
Results: Of the 102 patients identified with tuberculous spondylitis between 2013 and 2020, eight patients (two females and six males) with a mean age of 41.6 years (range, 18-61 years) demonstrated atypical imaging findings, including central vertebral body lesion, multiple skip vertebral lesions, extradural mass lesion and anterior subperiosteal lesion. All eight patients received anti-tuberculous medication treatment, and six underwent surgery. One patient developed a pleural effusion after debridement of the thoracic lesion. The mean follow-up period was 16.2 months (6-37 months). The VAS scores before treatment and at the final follow-up showed significant differences (7.25±1.49 and 0.0±0.0, respectively, P<0.01). Improved neurological function were observed in all patients. Solid fusion and osteogenic osteosclerosis were observed at the final follow-up, and no recurrence was observed in any cases.
Conclusions: All eight patients had a good prognosis. Image-guided biopsy and histopathological analysis are helpful for the early diagnosis of tuberculous spondylitis, especially when imaging features are not typical for this condition.
