Abstract
IN the past decade the literature on renal trauma has dealt with fundamentals of diagnosis and management during the early period after injury. Two cardinal issues — the value and risk of routine retrograde pyelography and the advisability of early surgical intervention as a policy — have monopolized debate and have shaped divergent programs of treatment.1 2 3 4 5 6 7 A recent experience with renal trauma indicates that the approach to the problem must take into account the possibility that the traumatized kidney is also the site of a pre-existing lesion. The importance of this special and additional factor has not yet been emphasized. . . .

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