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Histological examination of autopsied lungs. (A) The right lung, donated by the husband, and (B) the left lung, donated by the brother, showed accumulation of surfactant proteins (hematoxylin and eosin stain). (C) Chronic airway rejection that manifested as bronchiolitis obliterans was histologically confirmed (Elastica van Gieson stain). (D) Chronic vascular rejection was confirmed by C4d deposition on vascular endothelial cells (immunohistochemical stain).
