Investigation of the causes of BCG refractory in patients treated with intracavitary BCG as secondary treatment in superficial bladder tumors with transurethral resection.

Some modifiable factors originating from the patient and the tumoral characteristics were found to have an effect on BCG failure. It was further determined that the time until micturition after BCG administration is an important parameter to be considered in the prevention of application deficiencies. We believe these factors should be subjected to careful consideration during patient selection and follow-up.