title: Rare variant of venous stems of the retroperitoneal space in man.
mesh_terms: D001165:Arteriovenous Malformations / Q000209:etiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D012082:Renal Veins / Q000033:anatomy & histology*; D012187:Retroperitoneal Space / Q000098:blood supply*; D014682:Vena Cava, Inferior / Q000033:anatomy & histology*