We report a case of vesicoureteral reflux (VUR) 3 years after intravesical instillation of bacillus Calmette-Guérin (BCG, Tokyo 172 strain) against carcinoma in situ of the bladder. The present case suggests that a long-term careful follow-up is needed to detect not only tumor recurrences but also VUR as a late complication after intravesical BCG instillation.

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