@69_nbme_420 explanation is more correct. Adding it for visibility.
The question asks what cell type initiated the Fibrosis โ Alveolar macrophages engulf the particles and induce fibrosis (same pathophys for all Pneumoconiosis). Pathoma 2019 Pg 92
Pneumoconioses get allllll the way down to our alveoli to cause fibrosis and thus restrictive lung dz. Alveoli dont have the mucociliary elevator to clear shit so they depend on macrophages to get rid of substances.
submitted by โwelpdedelp(270)
It was a Ferruginous bodies--> asbestosis. Ferruginous bodies are believed to be formed by macrophages that have phagocytosed and attempted to digest the fibers.