A 38-year-old man from rural Maharashtra presents with a 4-month history of progressive back pain and low-grade fever. On examination, he has kyphotic deformity of the thoracic spine and a palpable gibbus. Plain radiographs show anterior vertebral body collapse with disc space involvement at T5–T6, and MRI reveals heterogeneous signal intensity with epidural extension causing cord compression. Sputum smear microscopy is negative, but GeneXpert MTB/RIF is positive. What is the most appropriate next step in management?

Explanation

## Management of Pott Disease with Myelopathy ### Clinical Context This patient has active tuberculosis of the spine (Pott disease) with epidural involvement and cord compression, confirmed by GeneXpert MTB/RIF. The presence of neurological compromise (cord compression on MRI) is a critical decision point. ### Treatment Algorithm ```mermaid flowchart TD A[Pott Disease with epidural extension]:::outcome --> B{Neurological deficit present?}:::decision B -->|Yes: Progressive deficit or paraplegia| C[ATT + Urgent surgical decompression]:::action B -->|No: Asymptomatic or mild compression| D[ATT with close neuro monitoring]:::action D --> E{Deterioration during ATT?}:::decision E -->|Yes| F[Surgical intervention]:::action E -->|No| G[Continue ATT 9-12 months]:::action C --> G ``` ### Key Management Principles **High-Yield:** - **Diagnosis confirmed:** GeneXpert MTB/RIF is gold standard for TB diagnosis; culture is not required to initiate treatment in resource-limited settings. - **Cord compression without active neurological deficit:** Medical management (ATT) is first-line. Surgery is reserved for: - Progressive neurological deterioration despite ATT - Complete paraplegia at presentation - Severe instability with kyphosis >60° - Failure to improve after 3–6 months of ATT **Key Point:** - Early ATT (within 2–4 weeks of diagnosis) prevents progression and allows inflammatory edema to resolve, often avoiding the need for surgery. - Epidural involvement alone is NOT an automatic indication for surgery if neurologically intact. **Clinical Pearl:** - Approximately 80% of Pott disease cases respond to medical management alone. Surgery is required in only 10–20% of cases (usually for instability, severe kyphosis, or failed medical therapy). ### Why This Approach? 1. ATT addresses the underlying infection and reduces inflammation. 2. Cord compression may be partly due to edema, which resolves with ATT. 3. Serial neurological examination and MRI at 6–8 weeks guide the decision for surgery. 4. Operative intervention carries morbidity; it is deferred unless medical management fails. [cite:Campbell's Operative Orthopaedics 13e Ch 42]