A 38-year-old man from rural Maharashtra presents with a 4-month history of progressive back pain, low-grade fever, and night sweats. On examination, he has kyphotic deformity of the thoracic spine and a palpable paravertebral abscess. Plain radiographs show anterior vertebral body collapse with loss of disc space height at T5–T6. MRI reveals heterogeneous signal intensity in the vertebral bodies with epidural involvement causing cord compression. Sputum smear microscopy is positive for acid-fast bacilli. What is the most appropriate next step in management?

Explanation

## Management of Pott Disease with Spinal Cord Compression ### Clinical Context This patient has active pulmonary tuberculosis with spinal involvement (Pott disease) complicated by epidural abscess and cord compression. The key decision is whether to treat medically first or proceed directly to surgery. ### Rationale for Medical Management First **Key Point:** Early-stage Pott disease with neurological deficit responds well to anti-tuberculous therapy (ATT) alone in the majority of cases. Surgery is reserved for: - Progressive neurological deterioration despite adequate ATT - Severe kyphotic deformity (>60°) with risk of late-onset myelopathy - Spinal instability refractory to medical management **High-Yield:** The standard approach is: 1. **Initiate ATT immediately** (HRZE for 2 months, then HR for 7–10 months) 2. **Monitor neurologically** with serial MRI at 3–6 months 3. **Reserve surgery** for failure of medical management (defined as lack of improvement after 3–6 months of ATT or progressive deficit) ### Why Medical Management Works - Cord compression in Pott disease is often due to **inflammatory edema and abscess**, not just bony destruction - ATT reduces inflammation, allows abscess resorption, and relieves compression - Neurological recovery occurs in >80% of cases with medical management alone - Early surgery in stable patients increases morbidity without improving outcomes ### Surgical Indications (Delayed) - Incomplete neurological recovery after 3–6 months of ATT - Progressive myelopathy despite ATT - Severe kyphosis (>60°) with risk of late-onset deficit - Spinal instability or retropulsion of bone/disc **Clinical Pearl:** Pott paraplegia has two types: early-onset (inflammatory, responds to ATT) and late-onset (mechanical, may need surgery). This patient likely has early-onset paraplegia. ### Why Other Options Are Incorrect - **Immediate surgery** bypasses the high success rate of medical management and increases operative morbidity in a patient with active TB - **Needle biopsy** is unnecessary when sputum smear is already positive; diagnosis is confirmed - **3-month ATT then surgery** is arbitrary; standard therapy is 9–12 months, and surgery timing is based on clinical response, not a fixed schedule [cite:Campbell's Operative Orthopaedics 13e Ch 63]