title: Collateral pathways in occlusion of the superior vena cava and its tributaries.
mesh_terms: D001401:Azygos Vein / Q000000981:diagnostic imaging; D016121:Brachiocephalic Veins; D003097:Collateral Circulation; D006801:Humans; D007601:Jugular Veins / Q000000981:diagnostic imaging; D010690:Phlebography; D013350:Subclavian Vein / Q000000981:diagnostic imaging; D014652:Vascular Diseases / Q000000981:diagnostic imaging*; D014683:Vena Cava, Superior