Imaging Findings

(A–C) Computed tomography (CT) of the chest: Axial images at three different levels demonstrate a left-sided thoracostomy tube with its tip within the fat of the anterior mediastinum (thick black arrows), as well as a significant degree of pneumomediastinum and subcutaneous emphysema (thin black arrows). Bilateral parenchymal opacities are also noted.

  Differential Diagnosis