A) The accumulation of haemosiderin pigment may be observed in some cases of pneumoconiosis, such as b) asbestosis with the presence of asbestos bodies.

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a) The accumulation of haemosiderin pigment may be observed in some cases of pneumoconiosis, such as b) asbestosis with the presence of asbestos bodies showing a linear non-birifringent “core” attracting ferrous material or c) pneumosiderosis (welder's lung... a) The accumulation of haemosiderin pigment may be observed in some cases of pneumoconiosis, such as b) asbestosis with the presence of asbestos bodies showing a linear non-birifringent “core” attracting ferrous material or c) pneumosiderosis (welder's lung) with bronchiolitis and sheets of macrophages having cytoplasmic iron pigment. Giulio Rossi et al. Eur Respir Rev 2017;26:170009 ©2017 by European Respiratory Society