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NBME 22 Answers

nbme22/Block 4/Question#3

A 60-year-old man comes to the physician because of ...

Alveolar macrophage

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submitted by welpdedelp(137),

It was a Ferruginous bodies--> asbestosis. Ferruginous bodies are believed to be formed by macrophages that have phagocytosed and attempted to digest the fibers.

almondbreeze  info about ferruginous bodies being mf can't be found on FA/UW :'( they just say it's 'material' +  
taediggity  FA 2020 677, FA 2019 659... mf?? mofos?? +  
69_nbme_420  Just to add: The question asks what cell type initiated the Fibrosis → Alveolar macrophages engulf the particles and induce fibrosis (same pathophys for all Pneumoconiosis). Pathoma 2019 Pg 92 +1