case_images: PMC5336710_01
case_images: A radiolucent band of air completely surrounding the heart (halo sign)
case_images: AJC-16-66-g001.jpg
case_images: PMC5336710_01_AJC-16-66-g001.jpg
case_images: F1
case_images: A radiolucent area surrounding the heart was observed on chest X-ray (halo sign) (Fig. 1).
case_images: Pneumopericardium on computed tomography
case_images: AJC-16-66-g002.jpg
case_images: PMC5336710_01_AJC-16-66-g002.jpg
case_images: F2
case_images: Thoracic computed tomography showed pneumopericardium and pericardial effusion (Fig. 2).