Ferruginous bodies are a histopathologic finding in patients with fibrotic lung diseases. They appear as small brown nodules in the septum of the alveolus. An alveolus (plural alveoli, from Latin alveolus, "little cavity" is an anatomical structure that has the form of a hollow cavity Ferruginous bodies are typically indicative of asbestos inhalation (when the presence of asbestos is verified they are called "asbestos bodies"). Asbestos is a group of Minerals with long thin fibrous Crystals The word "asbestos" (῾ἀσβεστος is derived from a Greek adjective In this case they are fibers of asbestos coated with an iron-rich material derived from proteins such as ferritin and hemosiderin. Ferritin is a Globular protein complex consisting of 24 protein subunits and is the main intracellular iron storage protein in both Prokaryotes Hemosiderin or haemosiderin is an abnormal Microscopic Pigment found in the Human body [1] Ferruginous bodies are believed to be formed by macrophages that have phagocytized and attempted to digest the fibers. Macrophages ( Greek: "big eaters" from makros "large" + phagein "eat" ( Mø) are cells within the tissues that
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