—Wiseman1 expressed the opinion that before operation is undertaken for the relief of obstructive effects of a congenital anomalous formation of the urinary tract it is of the utmost importance to make a thorough and searching urologic study. According to Hunner, too many single kidneys have been removed on the assumption that the patient possessed a second kidney. It is important to determine beforehand the presence or absence, as well as the degree, of infection in the kidney which is to be subjected to a plastic procedure, the functional status of the involved organ and the possibility of bilateral involvement. A congenital urinary anomaly is a potential source of obstruction and of subsequent urinary stasis and infection. Anomalous blood vessels in close proximity to the upper third of the ureter, although not actually responsible for the collapse of the ureter, may, by their pulsations, interfere with the
SCHOLL AJ, JUDD ES, VERBRUGGE J, HEPLER AB, GUTIERREZ R, O'CONOR VJ. A REVIEW OF UROLOGIC SURGERY. Arch Surg. 1935;31(2):315–344. doi:10.1001/archsurg.1935.01180140143012
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