Renal Scarring After Symptomatic and Asymptomatic Upper Urinary Tract Infection: A Prospective Study

Abstract
We followed 17 female patients, between 6 and 55 years old, without obstructive urinary disease, vesicoureteral reflux or neurogenic bladder, for at least 18 months after an episode of pyelonephritis. Pyelonephritis was documented by the washout bacterial localization technique of Fairley and associates. None of these patients had new caliceal clubbing or scarring on an excretory urogram during followup, which confirms that neither symptomatic nor asymptomatic pyelonephritis alone produces renal scarring in female patients of this age.