We reported in 1956 our experiences in the roentgen examination of the inferior vena cava (cavography) in expansive retroperitoneal processes.Following some minor modifications the method described a t that time was found to be extremely satisfactory and since then we have examined the inferior vena cava in a large number of cases both with and without various types of pathologic changes.In view of our further observations we now consider it worth while to present our findings in the total series. TechniqueWe continued to use bilateral percutaneous catheterization of the common iliac vein by SZLDINGER'S method.Simultaneous bilateral injection of contrast medium was
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Helander et al. (1959) studied this question.