Which pneumoconiosis characteristically shows 'eggshell calcification' of hilar lymph nodes on chest radiograph?
- A Silicosis ✓
- B Asbestosis
- C Byssinosis
- D Coalworkers' pneumoconiosis
Correct answer: A. Silicosis
Explanation
Eggshell calcification of hilar lymph nodes is the pathognomonic radiographic sign of silicosis, seen in workers exposed to crystalline silica (quarry workers, sandblasters, mine workers). Asbestosis produces pleural plaques, mesothelioma, and basal fibrosis. Byssinosis occurs in cotton mill workers (Monday morning chest tightness). Coal workers' pneumoconiosis shows rounded opacities but not eggshell calcification.
Reference: Park's Textbook of Preventive and Social Medicine, 27th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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