case_images: PMC11192090_01
case_images: Chest radiography shows an AC in the middle mediastinum in anteroposterior (A) and lateral (B) views. A CT scan shows a foreign body mass within the thoracic oesophageal lumen (C) with an AC located anterior to the mass (D).
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case_images: PMC11192090_01_jbsr-108-1-3583-g1.jpg
case_images: F1
case_images: A chest X-ray (Figures 1A and 1B) showed a cavity located posteriorly and caudally to the carina, containing a rounded opacity separated from the wall of the cavity by an airspace in a crescent shape. A coronal reformatted chest computed tomography (CT) identified a heterogeneous mass inside the thoracic oesophageal lumen (Figure 1C). Sagittal reformatting (Figure 1D) showed that the AC changed position, now anterior to the mass.
case_images: PMC11192090_02
case_images: Right hilar air crescent on a chest radiograph (arrows).
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case_images: F2
case_images: PMC11192090_03
case_images: Chest radiography shows an AC (arrows) inside the lumen of the left mainstem bronchus on the lateral view (B) and an iceberg sign on the frontal view (A). Coronal (C) and sagittal (D) reformatted CT showing the bronchial tumour associated with an AC.
case_images: jbsr-108-1-3583-g3.jpg
case_images: PMC11192090_03_jbsr-108-1-3583-g3.jpg
case_images: F3
case_images: On second reading, however, an AC was identified within the lumen of the left mainstem bronchus on lateral view, along with an iceberg sign on frontal view (Figures 3A and 3B), corresponding to bronchial tumoral stenosis. This was confirmed by the chest CT (Figures 3C and 3D) and bronchoscopy.
case_images: PMC11192090_04
case_images: Chest radiography shows a pneumoperitoneum and an AC in the right hypochondrium (A). A supine abdominal X-ray confirmed the AC at the level of the gallbladder bed (B). Unenhanced abdominal CT scan shows air within or next to the gallbladder wall (C and D) related to emphysematous cholecystitis.
case_images: jbsr-108-1-3583-g4.jpg
case_images: PMC11192090_04_jbsr-108-1-3583-g4.jpg
case_images: F4
case_images: AC in the right upper abdominal quadrant, overlying the liver (Figure 4A) and was confirmed by an abdominal X-ray (Figure 4B). An unenhanced abdominal CT showed air with a crescent shape within the gallbladder wall, leading to the diagnosis of perforated emphysematous cholecystitis (Figures 4C and 4D).