RESUMEN
We report a case of percutaneous bacillus Calmette-Guérin (BCG) perfusion therapy for carcinoma in situ (CIS) of upper urinary tract after radical cystectomy with ileal neobladder. A 42-year-old man underwent radical cystectomy and ileal neobladder diversion due to the recurrence of CIS in prostatic urethra after transurethral resection of bladder tumor 3 times and 2 courses of intravesical BCG therapy. Final pathological findings showed the presence of CIS in the right distal ureteral margin. After the radical cystectomy, our diagnosis was CIS in the right residual ureter, because of positive urine cytology and negative radiographic findings in the upper urinary tract. We performed the percutaneous BCG perfusion therapy for CIS of the right upper urinary tract after the construction of the percutaneous nephrostomy by intentionally inducing hydronephrosis. No recurrence was found after 3 years of BCG perfusion therapy.