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Figure 29b. Persistent PIE, pathologic features. (a) High-power photomicrograph (original magnification, x300; H-E stain) shows a cyst wall (arrowheads) composed of fibrotic connective tissue lined by multinucleated foreign body giant cells (arrow). (Reprinted, with permission, from reference 6.) (b) Photograph of the sectioned surgical specimen shows the lung parenchyma compressed by multiple intercommunicating air-filled cysts delimited by smooth membranes.
