Abstract
Eight cases (A group) having transitional cell carcinoma (TCC) localized in the upper urinary tract (renal pelvis and ureter), and 8 cases (B group) having TCC in both the upper urinary tract and bladder, were examined. The incidence of tumor cells in the voided urine and the renal urine obtained by various instruments, and the possible correlation between tumor size and this incidence, were investigated.
Incidences of cells in both voided urine and renal urine were relatively high at 75% and 69% respectively. Tumor size was thought to be one of the important factors influencing the incidence of TCC cells recognized in a smear.
It is necessary to perform the cytological examinations of both renal and voided urine in order to improve the diagnostic rate of TCC in the upper urinary tract. In the present study, more than 4 cytological examinations were necessary to obtain TCC cells in a smear of the voided urine.
