Correlation of cytology and cystoscopy

A total of 152 patients had cytology and cystoscopy performed for either initial or recurrent bladder tumors and postoperative control examinations. Positive cytology was found in 97 per cent of patients with pathologically proved bladder tumors. However, 23 per cent of the patients with negative cytology had positive cystoscopic and pathologically proved findings. Without cystoscopic examination a significant number of recurrent tumors may be missed because of a negative cytology.