NEET PG High-Yield: Anthracosis (Coal Worker’s Pneumoconiosis)
Anthracosis, or Coal Worker’s Pneumoconiosis (CWP), is caused by the chronic inhalation of coal dust. It represents a major occupational hazard in the mining industry.
Key Clinical & Pathological Findings
- Pathogenesis: Accumulation of coal dust particles in the lungs leads to the formation of “coal macules” and subsequently “coal nodules.”
- Simple CWP: Presence of coal macules; often asymptomatic or mild exertional dyspnea.
- Complicated CWP (Progressive Massive Fibrosis): Development of large, blackened, fibrotic masses (often >1 cm) causing significant respiratory impairment and pulmonary hypertension.
Comparison & Associations
| Feature | Details |
|---|---|
| Radiographic | Small, rounded opacities (often upper zone predominance). |
| Caplan Syndrome | Coal workers’ pneumoconiosis + Rheumatoid Arthritis. |
High-Yield NEET PG Pearls:
- “Black Lung”: Term used for the gross appearance of the lungs post-mortem due to massive carbon pigment deposition.
- Risk Factors: Duration of exposure and concentration of coal dust (bituminous coal is more hazardous than anthracite).
- Management: No curative treatment exists; removal from exposure is mandatory to prevent progression.
- Difference from Silicosis: Coal dust is generally less fibrogenic than free silica, though co-exposure is common in mining.