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Of 65 cases of renal pelvic and/or ureteral tumor treated at Department of Urology, The University of Tokyo, during the period from January 1975 through December 1991, 26 had bladder tumors as well. These cases were divided into three groups; 1) bladder tumor preceding upper urinary tract tumor, 2) bladder tumor found simultaneously with upper urinary tract tumor, and 3) bladder tumor following upper urinary tract tumor. In group 1 (nine cases), the last bladder tumor preceded renal pelvic and/or ureteral tumors by 3 to 42 months (mean 14.6 months), and in seven cases, bladder tumor recurred 3 to 29 months (mean 9.0 months) after nephroureterectomy. The interval between the diagnosis of preceding bladder tumor and upper urinary tract tumor was highly correlated with the latent period of postoperative recurrence of bladder tumor (r = 0.948). Highly malignant pathological grade of bladder tumor featured seven cases of group 2, with the survival rate being significantly (p &lt; 0.01) lower than that of other groups. In the group 3 consisting of ten cases, bladder tumors subsequently developed 6 to 37 months (mean 15.0 months). The latent period of bladder tumor was significantly (p &lt; 0.01) longer than that in group 1. These results indicated that the bladder tumors associated with renal pelvic and/or ureteral tumors have distinct characteristics depending on the sequence of association.

A CLINICAL STUDY ON RENAL PELVIC AND URETERAL TUMOR ASSOCIATED WITH BLADDER TUMOR