Dysphagia following fish bone ingestion

Clinical presentation

A 43‐year‐old woman was admitted to our emergency department with dysphagia and chest pain that developed soon after swallowing a fish bone. Her medical history was unremarkable as was the physical examination, ECG and chest x ray. She was admitted and treatment with a proton pump inhibitor commenced. Upper endoscopy was arranged to evaluate her dysphagia after a sufficient period of fasting. A purplish bulging mass was found over the middle to lower third of the oesophagus (fig 1). Chest CT scan was subsequently performed to confirm the diagnosis (figs 2 and 3).

Figure 1 Upper endoscopy of the patient.

Figure 2 Axial CT scan shows abnormal finding of the oesophagus (arrow).

Figure 3 Sagittal CT scan shows abnormal finding of the oesophagus (arrows).

Question

What is the diagnosis?

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