Imperfect drainage is usually the basic cause of chronic pyelitis in the adult. I have not seen a sufficient number of cases in children to warrant a similar dogmatic statement. By far the most common cause of renal urinary stasis in adults is ureteral stricture. In most of the infants and children I have treated for chronic pyelitis, ureteral obstruction has been present, and the usual tests by urogram and wax bulb have led me to interpret the obstruction as due to ureteral stricture. At any rate, I have found that establishment of urinary drainage by dilatation of the narrow ureteral area has resulted in a high percentage of cures in children as well as in adults.
Apparently, up to the present time, the concensus among general practitioners and pediatricians has been that for children with chronic pyelitis there is no therapy beyond medicinal and dietary measures, or in extreme
HUNNER GL. URETERAL STRICTURE AND CHRONIC PYELITIS IN CHILDREN. Am J Dis Child. 1927;34(4):603-623. doi:10.1001/archpedi.1927.04130220081009