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01.12.2014 | Original Article | Ausgabe 6/2014

International Journal of Clinical Oncology 6/2014

Long-term changes in renal function outcomes following radical cystectomy and urinary diversion

Zeitschrift:
International Journal of Clinical Oncology > Ausgabe 6/2014
Autoren:
Masatomo Nishikawa, Hideaki Miyake, Masuo Yamashita, Taka-aki Inoue, Masato Fujisawa

Abstract

Background

We analyzed long-term changes in the renal function of patients undergoing radical cystectomy and urinary diversion (UD).

Methods

This study included 169 patients who underwent radical cystectomy and UD (42, cutaneous ureterostomy; 40, ileal conduit; 87, neobladder substitution), and were followed for at least 60 months (median 106 months). Renal deterioration was defined as a >25 % decrease in the estimated glomerular filtration rate (eGFR) relative to that prior to surgery. We determined the associations between several parameters and postoperative renal deterioration.

Results

Despite the significantly younger age and more favorable renal function of patients with neobladder substitution than of those with other types of UD, no significant differences were observed in the remaining preoperative clinical parameters among the three different UD groups. The mean eGFR of the 169 patients decreased from 69.6 to 55.9 mL/min/1.73 m2, and renal deterioration was observed in 24 (57.1 %), 20 (50.0 %) and 34 (39.0 %) patients in the cutaneous ureterostomy, ileal conduit and neobladder substitution groups, respectively. Multivariate analysis of several parameters identified the presence of baseline hypertension and an episode of acute pyelonephritis, but not the type of UD, as significant predictors of postoperative renal deterioration.

Conclusions

The incidence of renal deterioration was comparatively high following radical cystectomy, irrespective of the type of UD. Special attention should be paid to the long-term preservation of renal function in these patients, particularly those with hypertension and/or episodes of acute pyelonephritis.

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