Recommended
More Related Content
Similar to Coal Workers Pneumoconiosis.pptx
Similar to Coal Workers Pneumoconiosis.pptx (20)
Recently uploaded
Recently uploaded (20)
Coal Workers Pneumoconiosis.pptx
- 3. Coal Workers Pneumoconiosis Coal worker’s pneumoconiosis (CWP) follows prolonged inhalation over 15-20 years of coal dust particles (1-3um in diameter) . Dust-laden alveolar macrophages aggregate to form macules in or near the centre of the secondary pulmonary lobule and a fibrotic reaction ensues, resulting in the appearance of scattered discrete fibrotic lesions. Classification is based on the size and extent of radiographic nodularity. Simple coal worker’s pneumoconiosis (SCWP) refers to the appearance of small radiographic nodules in an otherwise asymptomatic individual. SCWP does not impair lung function and, once exposure ceases, will seldom progress.
- 4. Clinical Features Asymptomatic, but coexisting chronic bronchitis is common. Chest X-Ray: many round opacities (1-10mm), especially in upper zone Management Avoid exposure to coal dust. Treat coexisting chronic bronchitis
- 5. Progressive massive fibrosis (PMF) Progressive massive fibrosis (PMF) refers to the formation of conglomerate masses (mainly in the upper lobes), which may cavitate. Progressive massive fibrosis (PMF) refers to the formation of conglomerate masses (mainly in the upper lobes), which may cavitate. The development of PMF is usually associated with cough, sputum that may be black (melanoptysis) and breathlessness. The chest X-ray appearances may be confused with lung cancer, TB and granulomatosis with polyangiitis.
- 6. Clinical Features Progressive dyspnea Fibrosis Cor pulmonale Chest X-Ray: Usually bilateral, upper mid zone fibrotic masses, develop from periphery towards hilum. Management Avoid exposure to coal dust.
- 7. Caplan’s syndrome PMF may progress, even after coal dust exposure ceases, and in extreme cases leads to respiratory failure and right ventricular failure Caplan’s syndrome describes the coexistence of rheumatoid arthritis and rounded fibrotic nodules 0.5–5 cm in diameter. They show pathological features similar to a rheumatoid nodule including central necrosis, palisading histiocytes, and a peripheral rim of lymphocytes and plasma cells. This syndrome may also occur in other types of pneumoconiosis.