[Anomalies of the inferior vena cava. 2 case reports]

Two cases of anomalous inferior vena cava are presented, with the emphasis on embryology. The first patient was investigated by venography for a clinically proven varicocele as a probable cause of infertility. A double inferior vena cava was found during venography, and was confirmed by computed tomography (CT). In the second case a left-sided inferior vena cava was an incidental finding when a CT scan was done as a diagnostic procedure in a case of Hodgkin's disease. A short summary of the embryology and the significance of the variants is presented.