Figure 3From: Alveolar epithelial cells undergo epithelial-mesenchymal transition in acute interstitial pneumonia: a case report Emergence of myofibroblasts in lung tissue. A, Immunohistochemistry staining showed that an amount of α-SMA-positive cells existed in the lung section from autopsy (62 d). B, Toluidine blue staining demonstrated a significant amount of fibroblastic foci in the lung section from autopsy (62 d).Back to article page