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Lung histology of case #4 with ascending COAD and asbestosis. (a) Diffuse interstitial fibrosis (blue arrow) with macrophages (green arrow) and asbestos bodies (red arrow) in the alveolar spaces (HE-20×); (b) several alveolar macrophages (green arrow) with an asbestos body (red arrow) in the alveolar space (HE-80×). (c) A dumbbell-shaped ferruginous body with visible asbestos fibers inside (yellow arrow) (HE-100×).
