[Changes in prostate specific antigen levels during intravesical instillations with Calmette-Guerin bacillus: relationship with transurethral resection of the prostate].

Objectives: To evaluate variations on the serum PSA levels during and after administration of intravesical BCG and its relationship with previous transurethral resection of the prostate (TURP).

Methods: PSA serum concentration variations were studied after each instillation, at 1 month and at 3 months in 24 patients with superficial bladder cancer and/or CIS under weekly BCG instillations treatment. Three patients had undergone TURP.