RISK FACTORS FOR INTRAVESICAL RECURRENCE FOLLOWING SURGICAL MANAGEMENT OF TRANSITIONAL CELL CARCINOMA OF THE UPPER URINARY TRACT

Abstract

To identify risk factors for developing subsequent bladder cancer in patients undergoing surgical management of transitional cell carcinoma (TCC) of the upper urinary tract.This study included 177 patients who were diagnosed as having clinically localized upper urinary tract TCC and thereafter underwent nephroureterectomy after exclusion of those with a previous and/or concurrent history of bladder cancer. Univariate and multivariate analyses using both the logistic regression model and the Cox proportional hazards model were carried out in these 177 patients to determine the risk factors for intravesical recurrence after nephroureterectomy.Of the 177 patients, 63 (35.6%) developed recurrent bladder cancer after a median interval of 7.5 months. Intravesical recurrence-free survival rates for these 177 patients at 1, 3, and 5 years were 75.7%, 63.7%, and 54.1%, respectively. Univariate analyses showed that patients with low-stage tumors and those with multifocal tumors were likely to undergo subsequent intravesical recurrence; however, there was no significant impact of other factors on subsequent intravesical recurrence, including age, tumor side, tumor location, surgical modality, operation time, management of the distal ureter, tumor grade, lymph node metastasis, microvascular invasion, lymphatic invasion, and margin status. Furthermore, pathologic stage and tumor multifocality were identified as independent predictors for the development of recurrent bladder cancer by multivariate analyses.The incidence of intravesical recurrence after nephroureterectomy for upper urinary tract TCC is comparatively high. It could be important to perform careful follow-up targeting intravesical recurrence for such patients after nephroureterectomy, particularly those with low-stage tumors and/or multifocal tumors.