CTICasesEsophageal Foreign Body (Swallowed Water Bottle Cap)
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Imaging findings
Chest CT with multiplanar reformats reveals a perfectly circular, thin, disc-shaped structure focally dilating and obstructing the mid-esophagus, which is radiolucent and virtually invisible on conventional chest radiographs.
Key takeaways
Ingested foreign bodies such as plastic water bottle caps may be completely radiolucent and missed on initial chest radiographs, requiring high-resolution chest CT with multiplanar reformats to clearly delineate their characteristic synthetic shape. Endoscopic retrieval is often required to prevent esophageal perforation, ulceration, or mediastinitis.
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