Fig. 3.

(A) Enhanced-contrast CT of the thorax at the axial view, showing a hypodensity in the left pleural cavity (*) with an extensive subcutaneous, extrathoracic, gas-forming extension (white arrow) of the collection to the left posterior chest wall, suggestive of left ET. (B) The collection with gas-forming extension (white arrow) at the coronal view. (C) The collection (*) at sagittal view. (D) A repeat CT of the thorax, revealing a reduction of the left pleural effusion (white arrow) and left posterior chest wall collection after completing 2 weeks of antibiotics.