All are true about silicosis except?
Ans. (c) Lower lobe is ussualy involved(Ref: Robbins 9th/pg 689; 8th/pg 687)Silicosis involves upper lobe more commonly than lower lobe. Examination of the nodules by polarized microscopy reveals the birefringent silicate particles (silica is weakly birefringent).
Bifringent crystals seen
Pleural plaque seen
Lower lobe is ussualy involved
Most common pnemoconiosis
Respiration