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What is On chest radiology, "egg-shell calcification" is seen in: and explain in detail?
Silicosis/Grinder's disease/Sand blasting disease : Most common pneumoconiosis Due to inhalation of quaz crystals (SiO2) Nodules seen in hilar lympho nodes and upper lobes of lung Increased risk of TB / malignancy CXR - Egg shell calcification (calcification on hilar LN) Histologic examination reveals the hallmark lesion characterized by a central area of whorled collagen fibers with a more peripheral zone of dust-laden macrophages.