Factors predisposing to renal scarring: following staged reconstruction of classical bladder exstrophy.

Preservation of renal function is one of the major goals of staged reconstruction of bladder exstrophy. In 68 exstrophy patients who have completed staged reconstruction, 10 (14.7%) have developed renal scarring. A multiple factorial analysis of these patients showed the following factors to be statistically related to the development of renal scarring: (1) one or more febrile urinary tract infections prior to bladder neck reconstruction (P less than .001); (2) failure to utilize antibiotic prophylaxis following initial bladder closure (P less than .005); (3) elevated urinary residuals greater than 50 mL (P less than .02); (4) a diagnosis of elevated urinary residuals greater than 6 months following the onset of continence (P less than .001); and (5) one or more febrile urinary tract infections following bladder neck reconstruction (P less than .005).