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a Axial CT image demonstrating a right-sided pneumothorax with stranding evident in the pleural space; a cystic lesion in the periphery of the lung parenchyma is also present, which shows demonstrable communication with the pleural space, compatible with pneumatocoele. b Low power view of the cystic space demonstrating the densely fibrotic wall with surrounding vascular congestion (reprinted with permission from the European Respiratory Journal)
