Multiple thoracic duct cysts: an unusual CT finding

Thoracic duct cysts in the mediastinum are rare. We report the case of a 66-year-old gentleman who was found to have multiple small thoracic duct cysts during investigation of a retrosternal thyroid goitre. Multiple paraoesphageal swellings were seen on a computed tomographic scan in the upper posterior mediastinum. The largest was 2 cm and they were continuous with the thoracic duct. This is this first reported case of multiple thoracic duct cysts. Previous cases are of a single large swelling, the majority of which were surgically excised. Small asymptomatic cysts such as the case we present are suitable for conservative management.