title: Collateral pathways occurring in simultaneous obstruction of the superior and inferior venae cavae.
abstract: The authors report a rare case of angiographically demonstrated simultaneous obstruction of both venae cavae. The case serves to illustrate an interesting and relatively unique mesenteric portal venous mechanism which became effective as a joint collateral pathway for both regions.
mesh_terms: D001401:Azygos Vein / Q000503:physiopathology; D003097:Collateral Circulation; D006801:Humans; D008297:Male; D008875:Middle Aged; D013924:Thrombophlebitis / Q000175:diagnosis / Q000503:physiopathology*; D014463:Ultrasonography; D014684:Venae Cavae / Q000473:pathology*