Abstract
We evaluated the long-term natural history of renal function after radical cystectomy and ileal conduit diversion
in 226 patients. The median estimated glomerular filtration rate (eGFR) decreased from 66 mL/min/1.73 m2 to
59 mL/min/1.73 m2
. The strongest predictor of an eGFR decline was CKD stage 1 or 2 (> 60 mL/min/1.73 m2
).
Introduction: Our objectives were to evaluate the long-term renal function after radical cystectomy (RC) and ileal
conduit diversion (ICD) and to analyze year-by-year the estimated glomerular filtration rate (eGFR) and morphologic
upper urinary tract changes. Patients and Methods: We retrospectively identified 226 patients who had undergone
RC and ICD from 1980 to 2008, with regular postoperative follow-up visits. The eGFR was calculated using the
Modification of Diet in Renal Disease equation at baseline and during follow-up. A decrease in renal function
was defined as > 1 mL/min/1.73 m2 annually. Results: The median follow-up period after RC was 91 months
(range, 61-235 months). The median eGFR decreased from 66 mL/min/1.73 m2 (range, 17-139 mL/min/1.73 m2
) to
59 mL/min/1.73 m2 (range, 33-102 mL/min/1.73 m2
). A rapid decline in renal function occurred during the first 2
postoperative years (9 mL/min/1.73 m2 and 4 mL/min/1.73 m2 in the first and second year, respectively), with a
moderate to slight decrease in the subsequent years. Urinary obstruction was diagnosed in 51 patients (23%). Among
the patients who underwent prompt surgical treatment, we did not find any association with the eGFR decline (P ¼ .8).
Conclusion: Patients with urinary ICD have a lifelong risk of chronic kidney disease. Regular monitoring of renal
function and the morphologic upper urinary tract will permit early diagnosis and treatment of modifiable factors,
avoiding irreversible kidney damage.
AbstractWe evaluated the long-term natural history of renal function after radical cystectomy and ileal conduit diversionin 226 patients. The median estimated glomerular filtration rate (eGFR) decreased from 66 mL/min/1.73 m2 to59 mL/min/1.73 m2. The strongest predictor of an eGFR decline was CKD stage 1 or 2 (> 60 mL/min/1.73 m2).Introduction: Our objectives were to evaluate the long-term renal function after radical cystectomy (RC) and ilealconduit diversion (ICD) and to analyze year-by-year the estimated glomerular filtration rate (eGFR) and morphologicupper urinary tract changes. Patients and Methods: We retrospectively identified 226 patients who had undergoneRC and ICD from 1980 to 2008, with regular postoperative follow-up visits. The eGFR was calculated using theModification of Diet in Renal Disease equation at baseline and during follow-up. A decrease in renal functionwas defined as > 1 mL/min/1.73 m2 annually. Results: The median follow-up period after RC was 91 months(range, 61-235 months). The median eGFR decreased from 66 mL/min/1.73 m2 (range, 17-139 mL/min/1.73 m2) to59 mL/min/1.73 m2 (range, 33-102 mL/min/1.73 m2). A rapid decline in renal function occurred during the first 2postoperative years (9 mL/min/1.73 m2 and 4 mL/min/1.73 m2 in the first and second year, respectively), with amoderate to slight decrease in the subsequent years. Urinary obstruction was diagnosed in 51 patients (23%). Amongthe patients who underwent prompt surgical treatment, we did not find any association with the eGFR decline (P ¼ .8).Conclusion: Patients with urinary ICD have a lifelong risk of chronic kidney disease. Regular monitoring of renalfunction and the morphologic upper urinary tract will permit early diagnosis and treatment of modifiable factors,avoiding irreversible kidney damage.
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