Diverticulum of the superior vena cava.
Hidvegi
R S
RS
D000783:Aneurysm / Q000151:congenital / Q000000981:diagnostic imaging; D004240:Diverticulum / Q000151:congenital / Q000000981:diagnostic imaging; D006801:Humans; D011859:Radiography; D014683:Vena Cava, Superior / Q000002:abnormalities / Q000000981:diagnostic imaging