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[BCG-therapy as a rare reason for postrenal failure].

HISTORY AND CLINICAL FINDINGS
 In the following case report, we describe a patient with acute renal failure due to an urinary congestion level II-III under BCG-(Bacillus Calmette-Guérin)-therapy because of bladder cancer. Cystoscopy revealed the diagnosis of BCG-induced intramural narrowing of distal ureters bilaterally.


THERAPY AND FURTHER DEVELOPMENT
 After receiving a double-J-catheter the renal function returned to normal.


CONCLUSIONS
 Although postrenal failure is relatively rare (5 %), also seldom causes such as medication-induced (e. g. BCG) ureter stenosis has to be included into the differential diagnosis.