Anatomical variant of large mediastinal veins: Incidental findings on MDCT chest

Thoracic veins congenital abnormalities are important uncommon developmental anomalies that have a wide range of presentation from isolated incidental findings to a part of more complex anomalies. It can be categorized into systemic venous system and pulmonary venous system. It is of important value to understand the mediastinal vascular anatomy to help to identify variable vascular anomalies. In this study we attempt to describe some incidentally encountered mediastinal large venous anatomical variants in patients undergoing MDCT chest in order to avoid further unnecessary studies.