A 46-year-old man was found to have an asymptomatic superior vena cava duplication with a large dominant left superior vena cava, a hypoplastic right superior vena cava, and a left-sided azygos arch ...during a thoracic CT Scan. Persistent left superior vena cava is mostly found in the context of a superior vena cava duplication, but this is the first case to date of such an asymmetrical diameter between the left and right superior vena cava, associated with a left-sided azygos vein. Furthermore, the patient had always been asymptomatic and had no other cardiac anomaly or anatomic vascular variation.
•Rare case of superior vena cava duplication.•Large dominant left superior vena cava, and hypoplastic right superior vena cava.•Left-sided azygos arch.•Implications during mediastinoscopy and catheterization procedures.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP