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[Value of bladder washing cytology in the diagnosis and follow-up of bladder tumors].

It is reported on the accuracy of the cytological examination of freshly voided urine of 247 patients with 318 urothelial bladder tumors, and the results are compared with the evaluation of bladder washing cytology in 82 patients with 105 bladder tumors. If voided urine is used for examination, there is no evidence in tumors with 0 and 1 grade of malignancy, whereas the bladder washing cytology of grade 1 tumors shows a correlation for the histological findings in 26.3%. In tumors with malignant grades GII and GIII, the bladder washing cytology shows a significantly higher accuracy (81.4%) than in examination of voided urine (67.2%). In both methods the accuracy of cytology rises with infiltration and differentiation grades of the tumor.