Name : Morteza
Family :Sanei Taheri
Affiliation : Radiology Department,Shohada Tajrish Hospital,SBMU
Academic Degree: Associate Professor of Radiology
Resident : Arezou Negahdari
Gender : Male
Age : 67
67 year-old man underwent chest CT scan for metastatic work up
Imaging Procedures and Findings
Contrast-enhanced CT scan reveals double SVC as an incidental finding, the left-sided SVC is opacified, draining into the coronary sinus, and the course of the right SVC draining normally can be seen.
A left SVC occurs in 0.3% of the population and descends through the left mediastinum anteriorly to join the coronary sinus, which drains into the RA .A double SVC (left SVC with a normal right SVC) is the most common variation (85%). A single left SVC is rare and is associated with congenital heart disease. Azygos continuation of the IVC is caused by the absence of the intrahepatic portion of the IVC, with failure of the right subcardinal vein to anastomose with the hepatic veins. The hepatic veins drain into the RA. The renal and iliac veins drain via the azygos and hemiazygos veins into theSVC. Findings include dilatation of the azygos vein, the azygos arch, and the SVC.
Brant,William E,Fundamentals of diagnostic radiology,3th edition,2006