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"The cytologic examination of the urine is simple and inexpensive for the early detection, follow-up and mass screening of genitourinary tumors. Nowadays, besides voiding urine, cytologic examination, of bladder washing, pelvis irrigation, contrast material during retrograde pyelography, prostatic massage fluid increased the diagnostic accuracy. Of 99 patients who were admitted to the department of Urology, National Medical Center from March 1979 to February 1980 for detection of genitourinary tumor, 18 cases were positive. Of 18 cases, 16 cases were proved as tumor by histopathologically. Diagnostic accuracy was 50.2% and false positive 3.0 %, false negative 43.7%. Of the 15 false negative cases, Grade I, U, K were as follows 9, 4, 1. The comparative study was performed on 22 cases of bladder tumor with bladder washing and voiding urine cytology, and the diagnostic accuracy of them were as follows. Bladder washing: 86.4%, voiding urine: 58.1%."
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