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Background: A non-negligible proportion of individuals diagnosed with cT1 renal cell carcinoma (RCC) are upstaged to pT3a at final pathology. Few data on oncological outcomes for these patients are available to determine whether partial nephrectomy (PN) might jeopardise cancer control. Objective: To assess, within an international multi-institutional collaboration, whether PN might undermine cancer control relative to radical nephrectomy (RN) in RCC patients with unexpected pT3a disease. Design, setting, and participants: International multi-institutional collaboration including patients with cT1abN0M0-pT3a RCC. Intervention: PN or RN. Outcome measurements and statistical analysis: We used Kaplan-Meier analyses, before and after propensity-score matching, to evaluate differences in metastatic progression (MP) and cancer-specific mortality (CSM) rates during follow-up. Univariable and multivariable Cox regression analyses were used to assess predictors of MP and CSM. Results and limitations: Overall, 309 patients with cT1abN0M0 RCC (cT1aN0M0, n = 107, 34.6%; cT1bN0M0, n = 202, 65.4%) had pT3a disease according to final pathology. Patients were treated with either PN (n = 71, 23%) or RN (n = 238, 77%). MP at 1, 2, and 5 yr was detected in 9.1%, 13.3%, and 24.1% of patients, respectively. CSM was 3.5%, 10.7%, and 18.4% at 1, 2, and 5 yr, respectively. After matching, no difference in terms of MP or CSM was observed between the PN and RN cohorts (both p>0.3). On multivariable analysis, type of surgery (PN vs RN) was not an independent predictor of either MP (p = 0.3) or CSM (p = 0.4). Limitations include the retrospective design. Conclusions: In patients with unexpected pT3a RCC at final pathology, PN does not appear to jeopardise cancer control with regard to MP and CSM. Patient summary: Cancer control is similar between patients treated with removal of the entire kidney and those with only partial removal, even if the final histology examination demonstrates a tumour that is unexpectedly not confined within the kidney. Partial nephrectomy does not undermine cancer control when unexpected pT3a renal cancer is identified at final pathology.

Background Although statin use has been associated with favorable effects in various solid malignancies, no conclusive evidence is available at present. Statins are safe and inexpensive, and may synergize with novel antiandrogen agents abiraterone via pharmacokinetic interactions and decrease substrate availability for de novo androgen biosynthesis. Objective To determine whether statin use affects survival in patients with metastatic castration-resistant prostate cancer (mCRPC) treated with abiraterone. Design, setting, and participants Medical records of patients with documented mCRPC between September 2011 and August 2016 were reviewed at multiple participating centers. This research was conducted in ten institutions, including both referral centers and local hospitals. A total of 187 patients receiving abiraterone for mCRPC between September 2011 and August 2016 were eligible for inclusion in this retrospective study. Outcome measurements and statistical analysis Patients were assessed for overall survival (OS), statin use at the time of treatment initiation, prostate-specific antigen (PSA) variations, and other variables of interest. Univariable and multivariable analysis was used to explore the association of variables of interest with OS and PSA declines. Results and limitations Statin use was a significant prognostic factor for longer OS in univariable (hazard ratio [HR] 0.51, 95% confidence interval [CI] 0.37–0.72; p p 50% decline at 12 wk: 72.1% in statin users vs 38.5% in non-users; p Conclusions Our study suggests a prognostic impact of statin use in patients receiving abiraterone for mCRPC. The mechanism of this interaction warrants elucidation, but may include enhancement of the antitumor activity of abiraterone as well as cardioprotective effects. Patient summary We assessed the effects of statin use in patients with advanced prostate cancer receiving abiraterone. Patients treated with a statin plus abiraterone appeared to live longer than those treated with abiraterone only. Since no negative drug-drug interaction is known and statins are widely used and inexpensive, further studies assessing the use of abiraterone plus statins are warranted.