A 38-year-old male worker in a textile mill presents to the occupational health clinic with a 6-month history of progressive dyspnea, dry cough, and chest tightness. He has been working in the carding and spinning department for 12 years. Chest X-ray shows bilateral lower lobe predominant reticular opacities. Spirometry reveals a restrictive pattern with FVC 65% predicted and FEV₁/FVC ratio 0.82. He denies smoking. What is the most appropriate next step in management?

Explanation

## Clinical Scenario Analysis This worker presents with classic features of an occupational lung disease — likely **cotton dust-related pneumoconiosis (byssinosis)** or **brown lung disease** — characterized by: - Progressive dyspnea and cough - Restrictive spirometry pattern - Bilateral reticular opacities on CXR - Long occupational exposure (12 years in textile mill) ## Diagnostic Approach **Key Point:** In suspected occupational lung disease, the diagnosis rests on a triad: (1) occupational history, (2) clinical-radiological findings, and (3) pulmonary function abnormality. Confirmation requires high-resolution CT (HRCT) chest and specialist evaluation. **High-Yield:** HRCT chest is superior to plain CXR for detecting early parenchymal changes and ruling out other diagnoses (TB, ILD, malignancy). It is the standard imaging modality in occupational medicine before specialist referral. ## Management Algorithm ```mermaid flowchart TD A[Suspected occupational lung disease]:::outcome --> B{Occupational history + CXR findings suggestive?}:::decision B -->|Yes| C[Perform HRCT chest]:::action C --> D[Refer to occupational medicine specialist]:::action D --> E{Diagnosis confirmed?}:::decision E -->|Yes| F[Remove from exposure]:::urgent E -->|No| G[Investigate alternative diagnoses]:::action F --> H[Rehabilitation & compensation]:::action ``` ## Why This Is the Correct Next Step 1. **HRCT chest** provides superior anatomical detail and helps confirm the pattern of occupational lung disease while excluding other diagnoses. 2. **Occupational medicine specialist referral** is essential for: - Formal diagnosis confirmation - Assessment of work capacity - Counseling on workplace removal - Initiation of rehabilitation - Documentation for compensation claims 3. This approach follows the **ILO guidelines** for occupational disease diagnosis and management. **Clinical Pearl:** Lung biopsy is NOT indicated in occupational lung disease diagnosis — it is a clinical-radiological diagnosis. Biopsy carries risk and does not change management. ## Subsequent Management (After Confirmation) - **Immediate:** Remove worker from dust exposure (no return to same department) - **Medical:** Supportive care (bronchodilators if airway obstruction develops) - **Legal:** File for occupational disease compensation and disability assessment - **Monitoring:** Annual spirometry and clinical review **Warning:** Continuing work in the same dust environment will lead to progressive deterioration. Corticosteroids are not first-line and have no proven benefit in occupational pneumoconiosis.