Citations

516 Background: The impact of diabetes mellitus (DM) on outcomes in patients with renal cell carcinoma (RCC) is controversial. Herein, we evaluated the association of DM with survival among patients with RCC. Methods: We reviewed 2,589 patients treated with nephrectomy for sporadic, unilateral, M0 RCC between 1990 and 2008 and compared demographic and tumor characteristics in patients with and without DM (nonDM). Patients with DM (n=313) were matched 1:2 to nonDM patients according to date of surgery, age, smoking status, obesity, ECOG performance status (PS), CKD stage, histological subtype, and nuclear grade. Cancer-specific (CSS) and overall survival (OS) were compared by Kaplan-Meier analysis. The association of DM with outcomes was evaluated with Cox proportional hazards regression models. Results: A total of 313 (12%) patients had DM. DM patients were significantly older at RCC diagnosis, more likely to be obese, and had higher Charlson scores, CKD class, rates of smoking, and worse PS at surgery (p<0.001). Patients with DM were also more likely to have ccRCC (83% vs. 76%, p=0.02) and to undergo nephron-sparing surgery (42% vs. 35%, p=0.01), while other pathologic features were similar in DM and nonDM. Among the 939 matched cases and controls, 463 patients died within a median of 5.5 years after nephrectomy. Median follow-up for survivors was 8.6 years. Five-year CSS was not significantly different among DM patients 84% vs. nonDM patients 87% (p=0.11), although 5-year OS was significantly worse among DM patients (66% vs. 75%; p<0.001). Indeed, even after adjusting for Charlson score, DM patients were noted to have a significantly increased risk of all-cause mortality (HR 1.33; p=0.004). In a subanalysis of patients with clear cell RCC, DM patients were more likely to die from RCC compared with nonDM patients after adjusting for the SSIGN (Stage, Size, Grade, Necrosis) score (HR 1.44; p=0.034). Conclusions: In this surgical cohort, DM was independently associated with decreased CSS among patients with ccRCC and with decreased OS in all RCC subtypes. Further studies to determine the potential biologic mechanism for this interaction are warranted.

402 Background: The American Urological Association (AUA) and the National Comprehensive Cancer Network (NCCN) are highly utilized sources for surveillance strategies following surgical treatment for renal cell carcinoma (RCC). However, the duration of follow-up may be inadequate to capture the majority of recurrences. Herein, we assess the ability of these guidelines to effectively capture recurrences of RCC following primary surgical resection. Methods: We reviewed our institutional database of 3,725 patients treated with radical or partial nephrectomy for M0 sporadic RCC between 1970-2008. For comparison to the AUA guidelines, patients were stratified into low risk following partial nephrectomy (LRp) or radical nephrectomy (LRr) = pT1N0, and moderate/high risk (M/HR) = pT2-4 N0-1. Guideline effectiveness was assessed by calculating the percentage of recurrences detected within the prescribed follow-up periods given for site-specific recurrence: AUA—LRp: 3yrs for all sites; LRr: 1yr for abdominal and 3yrs for chest/bone/other sites; M/HR: 5yrs for all sites; NCCN—6 months for abdominal/chest sites and 5yrs for bone/other sites. Results: Of the 3,725 patients, 2721 (73.1%) underwent radical nephrectomy, 2,210 (59.3%) were classified as pT1 NX-0 and 2,910 (78.1%) as clear cell RCC. Median postoperative follow-up was 8.9yrs (IQR 5.5-14.2) during which 1,114 (29.9%) patients developed recurrence. Of these recurrences, 760 (68.2%) would have been detected using the AUA guidelines and 432 (38.8%) by NCCN recommendations. Within AUA risk groups, 37.2% recurrences were captured in LRp, 31.4% in LRr and 80.2% in M/HR. Capture of 90% of recurrences in the abdomen and chest would require surveillance for 9yrs and 8 yrs, respectively in LRp, 15yrs and 12yrs in LRr and 11yrs and 10yrs in M/HR. Conclusions: Duration of follow-up recommended by current surveillance algorithms by the AUA and NCCN do not adequately capture many recurrences in RCC following radical or partial nephrectomy. Guidelines using risk stratification and site-specific recurrence parameters to assign length of surveillance may allow providers to better individualize surveillance regimens.

310 Background: The European Association of Urology (EAU) and the National Comprehensive Cancer Network (NCCN) provide general guidelines for bladder cancer (BC) surveillance following radical cystectomy (RC). However, it is unclear how well these guidelines capture recurrences after surgery. Herein, we assess the ability of current guidelines to effectively capture BC recurrence following RC and propose a risk stratified and recurrence site-specific surveillance strategy. Methods: We reviewed our institutional database of 1,800 patients who underwent primary RC between 1980-2007. Guideline effectiveness was assessed by calculating the percentage of recurrences detected within the prescribed follow-up periods: EAU—5yrs; NCCN—2yrs. Patients were then stratified according to stage: < = pT1Nx-0, > = pT2Nx-0, pN+, and recurrence site: urothelium, abdomen, chest, other. Recurrence free survival estimates for stage groups and recurrence site were assessed with Kaplan Meier models. Results: Of the 1,800 patients, 634 (35.2%) were classified as > pT2Nx-0 and 234 (13%) as pN+ and overall 228 (12.7%) received perioperative chemotherapy. Median postoperative follow-up was 10.6yrs (IQR 6.8-15.2), during which 716 (39.8%) patients developed recurrence. Of these recurrences, 492 (68.7%) would have been detected using the NCCN guidelines and 644 (89.8%) by EAU recommendations. However, ending oncologic surveillance at 5 years would only capture 81.7% of all recurrences for < = pT1Nx-0 patients and 83% of urothelial specific recurrences across all stage groups. Capture of 90% of recurrences, by stage group, in the urothelium, abdomen and chest would require surveillance for 8yrs, 8yrs and 4yrs, respectively in < = pT1Nx-0, 6yrs, 4yrs and 3yrs in > = pT2Nx-0 and 3yrs, 3yrs and 2yrs for pN+ patients. Conclusions: Duration of surveillance recommended for BC following RC by the EAU and NCCN do not comprehensively capture recurrences seen, specifically, in low risk patients and in cases of urothelial recurrence. Guidelines using risk stratification and site-specific recurrence patterns to assign length of surveillance may allow providers to better individualize surveillance regimens.

Objectives To describe the clinicopathological features associated with increased risk of renal fossa recurrence ( RFR ) after radical nephrectomy ( RN ) and to describe the prognostic features associated with cancer‐specific survival ( CSS ) among patients with RFR treated with primary locally directed therapy, systemically directed therapy or expectant management. Patients and Methods The records of 2 502 patients treated with RN for unilateral, sporadic, localized renal cell carcinoma ( RCC ) between 1970 and 2006 were reviewed. CSS after RFR was estimated using the Kaplan–Meier method. Associations with the development of RFR and CSS after RFR were evaluated using Cox proportional hazards regression models. Results A total of 33 (1.3%) patients developed isolated RFR ( iRFR ) and 30 (1.2%) patients developed RFR in the setting of synchronous metastases after RN (study cohort, N = 63). The median follow‐up for the series was 9.0 years after RN and 6.0 years after RFR diagnosis. On multivariable analysis, advanced pathological stage ( pT 2: hazard ratio [ HR ] 4.36, P = 0.004; pT 3/4: HR 4.39, P = 0.003) and coagulative necrosis ( HR 2.71, P = 0.006) were independently associated with increased risk of iRFR . The median time to recurrence was 1.5 years after RN among the 33 patients with iRFR , and 1.4 years among all patients. Overall, the median CSS was 2.5 years after diagnosis of iRFR , 1.3 years after RFR in the setting of synchronous metastases, and 2.2 years overall. After primary locally directed therapy (surgery, ablation or radiation), systemic therapy or expectant management, the 3‐year CSS rates among patients with iRFR were 63%, 50% and 13% ( P = 0.001) and were 64%, 50% and 28% ( P = 0.006) among all patients, respectively. On multivariable analysis, when compared with observation, locally directed therapies were associated with a significantly decreased risk of death from RCC ( HR 0.26, P < 0.001). Conclusions Renal fossa recurrence is a rare event after RN for RCC and portends a poor prognosis, even in the absence of synchronous metastases. Development of iRFR is associated with advanced stage and aggressive tumour biology. Patients who underwent primary locally directed therapy had superior CSS compared with those treated with expectant management, supporting the use of aggressive local treatment in carefully selected patients with RFR . Future research is needed to determine the optimum role and sequencing of combined therapy in patients with this rare entity.

Purpose The appropriate duration of surveillance for renal cell carcinoma (RCC) after radical or partial nephrectomy remains unknown, and evidence to support current guidelines are lacking. Herein, we provide an approach to surveillance that balances the risk of recurrence versus the risk of non-RCC death. Patients and Methods We identified 2,511 patients who underwent surgery for M0 RCC between 1990 and 2008. Patients were stratified for analysis by pathologic stage (pT1Nx-0, pT2Nx-0, pT3/4Nx-0, and pTanyN1), relapse location (abdomen, chest, bone, and other), age (< 50, 50 to 59, 60 to 69, 70-79 and ≥ 80 years), and Charlson comorbidity index (CCI; ≤ 1 and ≥ 2). Risks of disease recurrence and non-RCC death were estimated by using parametric models for time-to-failure with Weibull distributions. Surveillance duration was estimated at the point when the risk of non-RCC death exceeded the risk of recurrence. Results At a median follow-up of 9.0 years (interquartile range, 6.4 to 12.7 years), a total of 676 patients developed recurrence. By using a competing-risk model, vastly different surveillance durations were appreciated. Specifically, among patients with pT1Nx-0 disease and a CCI ≤ 1, risk of non-RCC death exceeded that of abdominal recurrence risk at 6 months in patients age 80 years and older but failed to do so for greater than 20 years in patients younger than age 50 years. For patients with pT1Nx-0 disease but a CCI ≥ 2, the risk of non-RCC death exceeded that of abdominal recurrence risk already at 30 days after surgery, regardless of patient age. Conclusion We present an individualized approach to RCC surveillance that bases the duration of follow-up on the interplay between competing risk factors of recurrence and non-RCC death. This strategy may improve the balance between the derived benefit from surveillance and medical resource allocation.

Objective To evaluate the clinical and radiographic predictors of the need for partial or circumferential resection of the inferior vena cava ( IVC ) requiring complex vascular reconstruction during venous tumour thrombectomy for renal cell carcinoma ( RCC ). Patients and Methods Data were collected on 172 patients with RCC and IVC (levels I– IV ) venous tumour thrombus who underwent radical nephrectomy with tumour thrombectomy at the Mayo Clinic between 2000 and 2010. Preoperative imaging was re‐reviewed by one of two radiologists blinded to details of the patient's surgical procedure. Univariable and multivariable associations of clinical and radiographic features with IVC resection were evaluated by logistic regression. A secondary analysis was used to assess the ability of the model to predict histological invasion of the IVC by the tumour thrombus. Results Of the 172 patients, 38 (22%) underwent IVC resection procedures during nephrectomy. Optimum radiographic thresholds were determined to predict the need for IVC resection based on preoperative imaging included a renal vein diameter at the renal vein ostium ( RV o) of 15.5 mm, maximum anterior–posterior ( AP ) diameter of the IVC of 34.0 mm and AP and coronal diameters of the IVC at the RV o of 24 and 19 mm, respectively. On multivariable analysis, the presence of a right‐sided tumour (odds ratio 3.3; P = 0.017), an AP diameter of the IVC at the RV o of ≥24.0 mm (odds ratio 4.4; P = 0.017), and radiographic identification of complete occlusion of the IVC at the RV o (odds ratio 4.9; P < 0.001) were associated with a significantly increased risk of IVC resection. The c‐index for the model was 0.81. Conclusions We present a multivariable model of the radiographic features associated with the need for IVC resection during tumour thrombectomy. Pending external validation, this model may be used for preoperative planning, patient counselling and planned involvement of vascular surgical colleagues in anticipation of the need for complex vascular repair.

Purpose The National Comprehensive Cancer Network (NCCN) and American Urological Association (AUA) provide guidelines for surveillance after surgery for renal cell carcinoma (RCC). Herein, we assess the ability of the guidelines to capture RCC recurrences and determine the duration of surveillance required to capture 90%, 95%, and 100% of recurrences. Patients and Methods We evaluated 3,651 patients who underwent surgery for M0 RCC between 1970 and 2008. Patients were stratified as AUA low risk (pT1Nx-0) after partial (LR-partial) or radical nephrectomy (LR-radical) or as moderate/high risk (M/HR; pT2-4Nx-0/pTanyN1). Guidelines were assessed by calculating the percentage of recurrences detected when following the 2013 and 2014 NCCN and AUA recommendations, and associated Medicare costs were compared. Results At a median follow-up of 9.0 years (interquartile range, 5.7 to 14.4 years), a total of 1,088 patients (29.8%) experienced a recurrence. Of these, 390 recurrences (35.9%) were detected using 2013 NCCN recommendations, 742 recurrences (68.2%) were detected using 2014 NCCN recommendations, and 728 recurrences (66.9%) were detected using AUA recommendations. All protocols missed the greatest amount of recurrences in the abdomen and among pT1Nx-0 patients. To capture 95% of recurrences, surveillance was required for 15 years for LR-partial, 21 years for LR-radical, and 14 years for M/HR patients. Medicare surveillance costs for one LR-partial patient were $1,228.79 using 2013 NCCN, $2,131.52 using 2014 NCCN, and $1,738.31 using AUA guidelines. However, if 95% of LR-partial recurrences were captured, costs would total $9,856.82. Conclusion If strictly followed, the 2014 NCCN and AUA guidelines will miss approximately one third of RCC recurrences. Improved surveillance algorithms, which balance patient benefits and health care costs, are needed.