A 32-year-old woman from Delhi presents with a 4-month history of progressive back pain and bilateral lower limb weakness. On examination, she has a palpable kyphotic deformity at the thoracolumbar junction, reduced power (3/5) in both legs, and brisk knee reflexes with extensor plantar responses. Plain radiographs show destruction of T12 and L1 vertebral bodies with anterior wedging and a paravertebral soft-tissue shadow. MRI reveals cord compression from epidural granulation tissue and abscess. Tuberculin skin test is positive. What is the most appropriate management at this stage?

Explanation

## Clinical Context: Progressive Myelopathy in Pott Disease **Key Point:** This patient has **active, progressive neurological deficit** (bilateral leg weakness, hyperreflexia, extensor plantar response) in the setting of cord compression from TB. This is a surgical emergency requiring urgent intervention. ## Distinguishing Features of This Case | Feature | This Patient | Typical Pott Disease | |---------|--------------|---------------------| | Neurological status | Progressive myelopathy (3/5 power) | Often asymptomatic or mild | | Cord compression | Epidural granulation + abscess | Usually edema/inflammation | | Timeline | 4 months (subacute progression) | Often indolent | | Imaging | Abscess formation visible | Edema predominates | **Clinical Pearl:** The presence of **epidural abscess** (not just edema) and **progressive neurological deficit** changes the management paradigm from medical-first to combined surgical-medical. ## Management Algorithm for Pott Disease with Myelopathy ```mermaid flowchart TD A[Pott Disease Diagnosed]:::outcome --> B{Neurological deficit?}:::decision B -->|None| C[ATT alone HRZE 2mo + HR 7mo]:::action B -->|Mild/stable| D{Epidural abscess present?}:::decision B -->|Severe/progressive| E{Abscess or mechanical block?}:::decision D -->|No| C D -->|Yes| F[ATT + Monitor closely]:::action E -->|Abscess/block| G[ATT + Urgent surgical decompression/fusion]:::urgent E -->|Edema only| H[ATT + Monitor; surgery if deteriorates]:::action G --> I[Anterior or posterior approach based on pathology]:::action F --> J[Reassess at 3-6 weeks]:::decision J -->|Improving| C J -->|Worsening| G ``` ## Why Surgery Is Needed Now **High-Yield:** Indications for **urgent surgical decompression** in Pott disease: 1. **Progressive neurological deficit** (as in this case) 2. **Epidural abscess** causing mechanical compression 3. **Severe myelopathy** (ASIA grade A–C) 4. **Failure to improve** after 3–6 weeks of ATT This patient meets criteria 1, 2, and 3. ## Surgical Approach **Key Point:** - **Anterior approach (corpectomy + strut grafting):** Preferred for anterior vertebral body destruction with abscess. Allows direct decompression and reconstruction. - **Posterior approach (laminectomy ± fusion):** Less effective for anterior pathology; reserved for posterior epidural involvement or instability. For this patient with T12–L1 destruction and epidural abscess, **anterior corpectomy with strut grafting** is most appropriate. ## Timing of Surgery **Clinical Pearl:** Surgery should be performed **within 1–2 weeks of ATT initiation**. Starting ATT immediately provides: - Systemic anti-TB coverage - Reduced inflammation (some cord decompression may occur) - Prevention of dissemination But delaying surgery >2 weeks in progressive myelopathy risks irreversible cord damage. ## Post-operative Management - Continue ATT for full 9 months (HRZE 2 mo + HR 7 mo) - Immobilization (brace or external fixation) until fusion consolidates (12–16 weeks) - Serial imaging and neurological assessment [cite:Campbell's Operative Orthopaedics 13e Ch 42; Harrison 21e Ch 158]