title: Venous collaterals in external and common iliac vein obstruction.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D003097:Collateral Circulation; D005260:Female; D006801:Humans; D007084:Iliac Vein / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D010388:Pelvis / Q000000981:diagnostic imaging; D010690:Phlebography; D013924:Thrombophlebitis / Q000000981:diagnostic imaging*