Superior Vena Cava Syndrome

**Definition:** A condition that occurs when the obstruction of the thin-walled SUPERIOR VENA CAVA interrupts blood flow from the head, upper extremities, and thorax to the RIGHT ATRIUM. Obstruction can be caused by NEOPLASMS; THROMBOSIS; ANEURYSM; or external compression. The syndrome is characterized by swelling and/or CYANOSIS of the face, neck, and upper arms which is called Pemberton's sign. Classification of SVC obstruction is often based on COLLATERAL CIRCULATION.

**Tree numbers:** - C14.907.800

**Synonyms:** - SVC Syndrome - Obstruction of the Superior Vena Cava - SVC Obstruction - Superior Vena Cava Obstruction