Chest X-ray showing opacity in the lung with irregular calcification is suggestive of

Ans. b (Hamartoma) (Ref. Harrison's medicine 17lh/558)Opacity in the lung with irregular calcification, i.e., poporn calcification = Hamartoma.The calcification of hamartomas can be stippled or conglomerate, referred to as "popcorn" calcification.# Opacity in the lung with "Bull's eye" calcification Lung granuloma# Opacity in lung with "Air crescent" SignAspergilloma (fungal ball).# Asympyomatic opacity in the lung without calcification can be Adenoma & bronchial atresia.# Opacity in the lung with corona radiate and or amorphous calcification Lung carcinoma# Opacity in lung with 'cyst in cyst'/floating water lilly/Callomate signHydatid cyst.# Opacity in the lung without calcification (if at all present-is arc-like) Hydatid cyst Also know:Carney's triad: multiple pulmonary chondromas + gastric epithelioid + extra-adrenal pheochromocytomas paragan- glioma.