“…Fistula formation after blunt trauma, although also exceedingly rare, can present with dysphagia, pleural effusion, or pneumonia. The "swallow-cough complex," also known as Ono's sign, is pathognomonic for traumatic tracheoesophageal fistula [9]. Barium esophagram is diagnostic, although water-soluble contrast media are preferred to avoid obfuscation of later images by residual barium.…”