Anuria due to calculous disease occurs under the following circumstances:
Two secreting kidneys may have both ureters or pelves blocked simultaneously, either synchronously or one following the other.
A single secreting kidney may be blocked, the other (a) being imperfectly developed, or (b) having been destroyed by disease, or (c) having been previously removed.
Both kidneys or a double kidney may have a fused single ureter which may be blocked by a calculus.
Two kidneys apparently normal may have one kidney blocked and the other failing to secrete reflexly, the so-called renorenal reflex block.
REPORT OF CASES
—A stout woman, aged 66, was anuric for six days and had intermittent pains in both flanks. She had been diabetic for ten years. Otherwise she was comfortable and rational. The blood pressure was 150 systolic and 70 diastolic. Roentgenograms were negative for shadows of calculi. Cystoscopy and pyelography on the