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 worked in the spinning section for 12 years. Clinical examination reveals fine end-inspiratory crackles bilaterally. Chest X-ray shows bilateral lower lobe predominant reticular opacities with hilar lymphadenopathy. Pulmonary function tests show a restrictive pattern with reduced DLCO. What is the most appropriate next step in management?

Explanation

## Clinical Presentation Analysis This patient presents with a classic occupational lung disease picture: textile worker with 12 years of exposure, progressive dyspnea, restrictive pattern on PFT, and radiological findings suggestive of byssinosis or occupational asthma progressing to chronic lung disease. ## Diagnostic Approach **Key Point:** When occupational lung disease is suspected based on clinical history, exposure, and initial investigations, the next step is confirmation of diagnosis through advanced imaging and specialist evaluation before initiating definitive management. **High-Yield:** HRCT chest is superior to plain radiography for: - Detecting early parenchymal changes - Characterizing the pattern (UIP, NSIP, or other) - Excluding alternative diagnoses - Establishing baseline for monitoring progression ## Rationale for Correct Answer HRCT chest followed by pulmonologist referral is the appropriate next step because: 1. **Diagnostic confirmation** — HRCT clarifies the pattern and severity before treatment decisions 2. **Specialist evaluation** — Pulmonologist can perform additional tests (bronchoscopy with BAL, transbronchial biopsy if needed) 3. **Baseline documentation** — Essential for medicolegal and compensation purposes in occupational disease 4. **Guides prognosis and treatment** — Different patterns (UIP vs. NSIP) have different outcomes and management strategies ## Management Sequence (After Diagnosis Confirmed) ```mermaid flowchart TD A[Suspected occupational lung disease]:::outcome --> B[HRCT chest + PFT]:::action B --> C[Pulmonologist evaluation]:::action C --> D{Diagnosis confirmed?}:::decision D -->|Yes| E[Remove from exposure]:::action D -->|Yes| F[Consider corticosteroids if active inflammation]:::action D -->|No| G[Alternative diagnosis workup]:::action E --> H[Regular follow-up with PFT]:::action F --> H ``` **Clinical Pearl:** Removal from exposure should occur after diagnosis confirmation, not before — premature removal without documented diagnosis weakens the occupational health claim and complicates compensation. [cite:Park 26e Ch 9]