Radiological aspects of benign renal mass lesions in infancy and early childhood.

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An account is given of the findings obtained at urography in benign expanding lesions of the kidney encountered in infancy and early childhood. Special emphasis is laid on the observation of any abnormality revealed in the nephrographic phase of excretion of the contrast medium, and on the appearance of the ureter and the bladder during early urography. In addition, the benefit drawn from prolongation of the urographic procedure in pertinent conditions is pointed out. Differential diagnostic aspects and technique are also considered.