Fig. 1
From: Right pneumothorax with congenital pericardial defect showed right atrium mimicking bulla in surgery
Chest radiography (A) shows a right lung collapse and a pneumopericardium on the left side. Computed tomography (CT) before surgery with lung window settings (B) and with mediastinal window settings (C) shows air in the pericardial sac and the right atrium was prolapsed into the right thoracic cavity