A 45-year-old sandblaster develops progressive exertional dyspnoea with bilateral upper lobe fibrosis and eggshell calcification of hilar lymph nodes on chest X-ray. What is the most likely diagnosis?
- A Silicosis ✓
- B Asbestosis
- C Coal workers' pneumoconiosis
- D Berylliosis
Correct answer: A. Silicosis
Explanation
Silicosis is caused by inhalation of free crystalline silica (SiO₂) and is the commonest pneumoconiosis in India. Classic radiological features include bilateral upper lobe nodular fibrosis and eggshell calcification of hilar lymph nodes (calcification of peripheral rim of lymph node). Silicosis also predisposes to tuberculosis (silico-tuberculosis). Asbestosis causes bilateral lower lobe fibrosis and pleural plaques.
Reference: Park's Textbook of Preventive and Social Medicine, 27th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.