Factors affecting long-term renal functions after partial vs radical nephrectomy for clinical T1 renal masses: A Multicentre Study of the Urooncology Association, Turkey.

PURPOSE: To compare the functional outcomes of patients who underwent partial (PN) or radical nephrectomy (RN) for clinical T1 (cT1) renal tumours using the Kidney Cancer Database of the Urooncology Association, Turkey. METHODS: We retrospectively reviewed 1004 patients who underwent PN and RN for cT1 renal tumours at multiple academic tertiary centres between 2000 and 2018. Patients with preoperative end-stage chronic kidney disease and/or metastatic disease were excluded. RESULTS: There were 452 patients in the PN group and 552 patients in the RN group. The median follow-ups were 74.9 and 83.7 months in RN and PN cohort. The eGFR was significantly reduced in both groups on postoperative day 1 (PN = 13.7 vs RN = 19.1 mL/min/1.73 m2 : P < .001). In the PN group, eGFR showed a tendency to recover according to a quadratic pattern and reached preoperative levels in the first and third years (95.6 ± 28.8 mL/min/1.73 m2 and 96.9 ± 28.9 mL/min/1.73 m2 , respectively), with no significant difference between the eGFRs in the 1st and 3rd years (P = .710). To define groups at risk, different cut-off values for the GFR were considered. Among patients with a baseline GFR < 90, the RN cohort had significantly lower eGFRs in the first and third years than the PN cohort (P = .02). Logistic regression showed that comorbidities, coronary artery disease, diabetes and hypertension had no adverse impacts on the changes in the eGFR (P = .60, P = .13, and P = .13, respectively). CONCLUSION: For the treatment of stage T1 kidney tumours, open or laparoscopic partial nephrectomy has the benefit to preserve renal function.

The effect of body mass index on oncological and surgical outcomes in patients undergoing radical cystectomy for bladder cancer: A multicentre study of the association of urooncology, Turkey.

OBJECTIVE: We aimed to evaluate the effect of body mass index (BMI) on oncological and surgical outcomes in patients who underwent radical cystectomy (RC) for bladder cancer (BC). MATERIALS AND METHODS: We retrospectively assessed data from patients who underwent RC with pelvic lymphadenectomy and urinary diversion for BC recorded in the bladder cancer database of the Urooncology Association, Turkey, between 2007 and 2019. Patients were stratified into three groups according to the BMI cut-off values recommended by the WHO; Group 1 (normal weight, <25 kg/m2 ), Group 2 (overweight, 25.0-29.9 kg/m2 ) and Group 3 (obese, ≥30 kg/m2 ). RESULTS: In all, 494 patients were included, of them 429 (86.8%) were men and 65 (13.2%) were women. The median follow-up was 24 months (12-132 months). At the time of surgery, the number of patients in groups 1, 2 and 3 were 202 (40.9%), 215 (43.5%) and 77 (15.6%), respectively. The mean operation time and time to postoperative oral feeding were longer and major complications were statistically higher in Group 3 compared to Groups 1 and 2 (P = .019, P < .001 and P = .025, respectively). Although the mean overall survival (OS), cancer-specific survival (CSS), recurrence-free survival (RFS) and metastasis-free survival (MFS) was shorter in cases with BMI ≥ 30 kg/m2 compared with other BMI groups, differences were not statistically significant (P = .532, P = .309, P = .751 and P = .213, respectively). CONCLUSION: Our study showed that although major complications are more common in obese patients, the increase in BMI does not reveal a significant negative effect on OS, CSS, RFS and MFS.