EARLY FORMS OF RENAL PAPILLARY NECROSIS

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Abstract
Cases are presented to show that early forms of renal papillary necrosis can be confidently recognized. In patients having long-standing diabetes, the incidence of renal papillary necrosis was 18 per cent. Identification is important for directing proper treatment and for the search of unknown etiologies of renal papillary necrosis in patients without diabetes, analgesic abuse or urinary tract obstruction. Late stages of renal papillary necrosis may not be distinguished in many instances from chronic pyelonephritis unless fragments of necrotic tissue have been recovered. In 2 patients who passed necrotic papillae, initial retrograde pyelograms were normal.

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