| http://www.w3.org/ns/prov#value | - INTRODUCTIONSuperior vena cava (SVC) syndrome results from any condition that leads to obstruction of blood flow through the SVC. Obstruction can be caused by invasion or external compression of the SVC by an adjacent pathologic process involving the right lung, lymph nodes, and other mediastinal structures, or by thrombosis of blood within the SVC. In some cases, both external compression and thr
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