Figure 4From: High resolution CT and histological findings in idiopathic pleuroparenchymal fibroelastosis: Features and differential diagnosisHistological features of patient no. 2. Marked subpleural thickening can be observed with sparing of adjacent lung parenchyma (4A). Fibroblast focus (ff) covered by alveolar epithelial cells is highlighted at the boundary between fibroelastic (4B, elastic stain) tissue and alveolar parenchyma (4C, cytokeratin 8/18 immunohistochemistry).Back to article page