Mediastinal foregut duplication cyst presenting as a rare cause of breathing difficulties in an adult.

Foregut duplication cysts are rare congenital anomalies of enteric origin. The diagnosis is usually made in infancy. We report the unusual case of a 71-year-old female presenting to the ENT department with shortness of breath and stridor due to an oesophageal reduplication cyst. The presentation, diagnosis and management of this potential pitfall for the unwary are outlined.