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Figure 2 | Respiratory Research

Figure 2

From: Autopsy analyses in acute exacerbation of idiopathic pulmonary fibrosis

Figure 2

The histopathological findings of the lung specimens obtained at autopsy. The microscopic findings of the lung showed diffuse alveolar hemorrhage (arrows) without any specific evidence of vasculitis (A) or pulmonary thromboembolism (B) (H&E, ×10). The macroscopic findings of the heart showed overt right ventricular hypertrophy, confirmed by an increased (≥5 mm) right ventricular wall thickness (double-headed arrows) (C). Immunohistochemical staining of an inflamed lung tissue specimen revealed a number of specific cytomegalovirus-positive cells (proliferating type II pneumocytes) (D).

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