<prompt> Ferruginous bodies are seen in -SilicosisBysinosisAsbestosisBaggassosis  <response>: Ref:Textbook of pathology Harsh mohan 6th edition, page no.492 Histologically there is presence of characteristic asbestos bodies in the involved areas . These are asbestos fibres coated with glycoprotein and haemosiderin and appear beaded or dumbbell-shaped. The coating stains positively for Prussian blue reaction. 