Familiar congenital absence of valves in the deep leg veins.
D000328:Adult; D001827:Body Height; D000013:Congenital Abnormalities / Q000235:genetics; D005260:Female; D006801:Humans; D007866:Leg / Q000098:blood supply* / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged; D010375:Pedigree; D010690:Phlebography; D014648:Varicose Veins / Q000235:genetics; D014680:Veins / Q000002:abnormalities*; D014689:Venous Insufficiency / Q000235:genetics