Umberto Capitanio1,2, Alessandro Larcher3,4, Giuseppe Fallara3,4, Francesco Trevisani3, Esteban Porrini5, Federico Di Marco3, Gianfranco Baiamonte3,4, Chiara Re3,4, Arianna Bettiga3, Giacomo Dell'Antonio6, Claudio Doglioni6, Francesco De Cobelli7, Roberto Bertini3, Andrea Salonia3,4, Francesco Montorsi3. 1. Unit of Urology, Department of Urology, San Raffaele Scientific Institute, IRCCS Ospedale San Raffaele, Via Olgettina 60, 20132, Milan, Italy. capitanio.umberto@hsr.it. 2. Division of Experimental Oncology, Urological Research Institute (URI), IRCCS Ospedale San Raffaele, Milan, Italy. capitanio.umberto@hsr.it. 3. Unit of Urology, Department of Urology, San Raffaele Scientific Institute, IRCCS Ospedale San Raffaele, Via Olgettina 60, 20132, Milan, Italy. 4. Division of Experimental Oncology, Urological Research Institute (URI), IRCCS Ospedale San Raffaele, Milan, Italy. 5. Center for Biomedical Research of the Canary Islands (CIBICAN), University of La Laguna, Tenerife, Spain. 6. Unit of Pathology, IRCCS Ospedale San Raffaele, Milan, Italy. 7. Unit of Radiology, IRCCS Ospedale San Raffaele, Milan, Italy.
Abstract
PURPOSE: The role of non-tumour renal biopsy in predicting renal function after surgery for renal cell carcinoma (RCC) is poorly investigated. The aim of the study was to assess the impact of renal parenchymal histology on renal function after radical nephrectomy in a cohort of patients with RCC. METHODS: This cohort study included 171 patients with RCC submitted to radical nephrectomy between 2006 and 2018. Two biopsy samples from normal parenchyma were collected at nephrectomy and renal parenchyma damage (RPD) was scored on histologic samples according to validated methodology. The outcomes were eGFR after surgery and its reduction > 25% relative to baseline at maximum 12 months' follow-up. Linear and logistic multivariable regression were used, adjusting for age at surgery, presence of hypertension, diabetes, clinical tumour size, time from surgery and basal eGFR. RESULTS: 171 patients were enrolled and RPD was demonstrated in 64 (37%). Patients with RPD had more comorbidities (CCI > 2 in 25 vs. 9%, p < 0.001), in particular hypertension (70 vs. 53%; p = 0.03), diabetes with (5% vs. 0%, p = 0.007) or without (31 vs. 18%; p = 0.007) organ damage, cerebrovascular disease (19 vs. 5%; p = 0.006) and nephropathy (20 vs. 3%; p = 0.0004). At multivariable analyses, RPD was associated with lower eGFR (Est. - 5.48; 95% CI - 9.27: - 1.7; p = 0.005) and with clinically significant reduction of eGFR after surgery (OR 3.06; 95% CI 1.17: 8.49; p = 0.026). CONCLUSIONS: Presence of RPD in non-tumour renal tissue is an independent predictor of functional impairment in patients with RCC. Such preliminary finding supports the use of parenchyma biopsy during clinical decision making.
PURPOSE: The role of non-tumour renal biopsy in predicting renal function after surgery for renal cell carcinoma (RCC) is poorly investigated. The aim of the study was to assess the impact of renal parenchymal histology on renal function after radical nephrectomy in a cohort of patients with RCC. METHODS: This cohort study included 171 patients with RCC submitted to radical nephrectomy between 2006 and 2018. Two biopsy samples from normal parenchyma were collected at nephrectomy and renal parenchyma damage (RPD) was scored on histologic samples according to validated methodology. The outcomes were eGFR after surgery and its reduction > 25% relative to baseline at maximum 12 months' follow-up. Linear and logistic multivariable regression were used, adjusting for age at surgery, presence of hypertension, diabetes, clinical tumour size, time from surgery and basal eGFR. RESULTS: 171 patients were enrolled and RPD was demonstrated in 64 (37%). Patients with RPD had more comorbidities (CCI > 2 in 25 vs. 9%, p < 0.001), in particular hypertension (70 vs. 53%; p = 0.03), diabetes with (5% vs. 0%, p = 0.007) or without (31 vs. 18%; p = 0.007) organ damage, cerebrovascular disease (19 vs. 5%; p = 0.006) and nephropathy (20 vs. 3%; p = 0.0004). At multivariable analyses, RPD was associated with lower eGFR (Est. - 5.48; 95% CI - 9.27: - 1.7; p = 0.005) and with clinically significant reduction of eGFR after surgery (OR 3.06; 95% CI 1.17: 8.49; p = 0.026). CONCLUSIONS: Presence of RPD in non-tumour renal tissue is an independent predictor of functional impairment in patients with RCC. Such preliminary finding supports the use of parenchyma biopsy during clinical decision making.
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