Observations on the value and limitations of infusion pyelography in anuric patients.

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Infusion pyelography was performed in 103 anuric patients with no attendant mortality. It was useful in 83 cases in distinguishing obstructive uropathy from renal parenchymal disease. However, in the remaining 20 cases when either renal parenchymal disease co-existed with obstructive uropathy or obstructive uropathy existed alone under certain circumstances, opacification of the collecting system did not occur. The clinicopathological setting of some of the latter group of cases is illustrated by examples.