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Location of primary and recurrent superficial bladder tumors and benefits of selective biopsies.

Surgical records and bladder diagrams of 856 patients suffering from superficial bladder cancer were summarized into bladder tumor maps. Areas of high tumor density were created giving thus an opportunity to take selective cold cup biopsies. Two hundred and sixteen tissue samples were taken in a group of 62 patients and 12.1% positive results were obtained. The benefit of routinely performed selective biopsies during the first surgery have been discussed.