A 28-year-old woman from Delhi presents with progressive paraplegia over 3 months. Imaging shows Pott disease of the thoracic spine (T4–T6) with severe kyphotic deformity (60°), anterior vertebral collapse, and epidural abscess causing cord compression. She has no neurological improvement despite 6 weeks of standard anti-TB therapy (HRZE). What is the most appropriate next step in management?

Explanation

## Management of Pott Disease with Spinal Cord Compression and Neurological Deficit **Key Point:** Progressive or severe neurological deficit (paraplegia) in Pott disease is an absolute indication for surgical intervention, regardless of medical therapy duration. Medical management alone cannot decompress the spinal cord. ### Indications for Surgery in Pott Disease **High-Yield:** Surgical intervention is indicated in the following scenarios: | Indication | Urgency | Rationale | |-----------|---------|----------| | **Active paraplegia/paraparesis** | Urgent | Cord compression requires decompression | | **Progressive neurological deficit** | Urgent | Ongoing cord damage despite medical therapy | | **Severe kyphotic deformity (>60°)** | Semi-elective | Risk of late-onset kyphotic myelopathy | | **Instability** | Semi-elective | Prevention of deformity progression | | **Failure to improve after 6–8 weeks of medical therapy** | Semi-elective | Medical therapy alone insufficient | | **Retropulsed bone/disc causing cord compression** | Urgent | Mechanical obstruction requires removal | **Clinical Pearl:** In this case, the patient has BOTH active paraplegia AND failure to improve after 6 weeks of anti-TB therapy. This is a clear surgical emergency. ### Surgical Approach: Anterior Corpectomy with Fusion 1. **Anterior approach** (anterolateral thoracotomy or thoracoscopy) - Allows direct visualization and debridement of infected vertebral bodies - Removal of caseous material and abscess - Decompression of anterior epidural abscess 2. **Corpectomy** (removal of affected vertebral bodies) - Removes the primary source of compression - Allows restoration of vertebral height 3. **Fusion** (with bone graft ± instrumentation) - Restores spinal stability - Prevents kyphotic progression - Allows early mobilization **Mnemonic:** **AACF** = **A**nterior approach, **A**bscess drainage, **C**orpectomy, **F**usion [cite:Campbell's Operative Orthopaedics 14e] ### Timeline for Surgery - **Acute paraplegia (< 18 months duration):** Better prognosis; surgery should be performed urgently - **Chronic paraplegia (> 18 months):** Poorer prognosis; surgery may still improve function but recovery is slower - **This patient (3 months duration):** Excellent candidate for surgery with high likelihood of neurological recovery **Warning:** Delaying surgery in active paraplegia leads to irreversible spinal cord damage. The "window of opportunity" for recovery narrows with time. ### Medical Therapy Continuation - Anti-TB therapy (HRZE) must continue for 18–24 months post-operatively - Corticosteroids are NOT first-line; they are reserved for severe cord edema in select cases - Increasing rifampicin dose or adding fluoroquinolone does NOT address mechanical compression ### Why Medical Therapy Alone Failed Medical therapy addresses the infection but CANNOT: - Remove the abscess mechanically - Decompress retropulsed bone - Restore vertebral height - Prevent kyphotic progression These require surgical intervention.