Anomalies of the systemic venous system.
D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D002965:Classification; D006330:Heart Defects, Congenital / Q000145:classification / Q000000981:diagnostic imaging; D006801:Humans; D010690:Phlebography; D014680:Veins / Q000002:abnormalities*