["Connected device for monitoring patients treated by prostatectomy: Implementation and qualitative assessment"]. / Dispositif connecté de suivi des patients traités par prostatectomie totale : mise en place et évaluation qualitative.

INTRODUCTION: Support care aims to improve the experience of patients. m-health is one of the tools recently developed to promote patient empowerment. The objective of this study was to evaluate the appreciation of an m-health application to enhance prostatectomy path for patients suffering from prostate cancer. METHOD: A prospective monocentric study was conducted in the urology department of the University Hospital of Rennes from February to April 2023. MyCHU application was optimized by integrating information sheets in the postoperative period after prostatectomy on sphincter rehabilitation exercises, erectile dysfunction and urinary incontinence. The questionnaire used to evaluate the usability of "MyCHU" application was the System Usability Scale (SUS). Semi-structured interviews explored the patients' feelings about the content of the information sheets and the impact on their empowerment regarding sexual disorders. RESULTS: Twelve patients participated in this study and 7 agreed to complete an interview The average SUS score was 75.58, which indicate an high usability. Patients appreciated the fact that the application structured their healthcare pathway by centralizing information. The information sheets were clear and accurate. The impact on their empowerment was positive, with a gain in their ability to take ownership of the therapies. CONCLUSION: The role of digital technology in health care has been growing in recent years. Our study has shown the interest that mobile application can bring to the patient who undergoes prostatectomy. It increases his empowerment and favor the dialogue with his surgeon.

Comparison of open and robotic-assisted partial nephrectomy approaches using multicentric data (UroCCR-47 study).

We compared the outcomes of robotic-assisted partial nephrectomy (RPN) and open partial nephrectomy (OPN) using contemporary data to respond to unmet clinical needs. Data from patients included in the registry who underwent partial nephrectomy between January 01, 2014 and June 30, 2017 within 20 centres of the French Network for Research on Kidney Cancer UroCCR were collected (NCT03293563). Statistical methods included adjusted multivariable analyses. Rates of peri- and post-operative transfusion, and of surgical revision, were lower in the RPN (n = 1434) than the OPN (n = 571) group (2.9% vs. 6.0%, p = 0.0012; 3.8% vs. 11.5%, p < 0.0001; 2.4% vs. 6.7%, p < 0.0001, respectively). In multivariable analyses, RPN was independently associated with fewer early post-operative complications than OPN (overall: odds-ratio [95% confidence interval, CI] = 0.48 [0.35-0.66]; severe: 0.29 [0.16-0.54], p < 0.0001 for both) and shorter hospital stays (34% [30%; 37%], p < 0.0001). RPN was also a significantly associated with a decresedrisk of post-operative acute renal failure, and new-onset chronic kidney disease at 3 and 12 months post-surgery. There were no between-group differences in oncological outcomes. In comparison with OPN, RPN was associated with improved peri- and post-operative morbidity, better functional outcomes, and shorter hospital stays. Our results support the use of RPN, even for large and complex tumours.

[Complications in urological surgery: Monitoring and classification]. / Les complications en chirurgie urologique. Recueil et classification.

The objective of this article was to discuss the statistics of surgical complications in urology and the methods of collection and classification. In the absence of a comprehensive national registry of complications, we used statistics from insurance companies as indicators. They are limited by the exclusion of complications that did not result in a claim. Overall, urology is less exposed to claims than other surgical specialties. It comes far behind orthopedic surgery, gynecology-obstetrics and visceral surgery. The new techniques in urological surgery and in particular the rise of robotic surgery do not seem to have modified the number of claims handled by medical insurance companies. It is unfortunate that complications in urological surgery are not collected, reported, and discussed in order to develop prevention, treatment, and strategies for educational purposes. The lack of an established definition and classification of surgical complications, as well as methodological differences in the collection of related information, has hampered the evaluation of their public health and health economics impact. Awareness of this problem is growing among learned societies and practitioners. Complication reporting should be organized on a national basis and should respect the following points: - definition of the collection process according to a validated system. For urology, the Martin table revised by the EAU working group would be adapted; - classification of complications according to a validated system such as Clavien-Dindo or CCI.

[Complications of radical nephrectomy and partial nephrectomy: What are they? How can they be anticipated and managed?] / Les complications de la néphrectomie totale et de la néphrectomie partielle : quelles sont-elles, comment les prévenir et les prendre en charge ?

INTRODUCTION: Surgical techniques of radical and partial nephrectomy have changed over the last 20years. Indications for partial nephrectomy have widened and mini-invasive surgery (laparoscopy and robotic assistance) has become widely used. However, both still have a significant morbidity. The objective of this article is to review complications of renal surgery and their predictive factors and to offer algorithms of management. METHODS: Recent literature regarding complications of radical and partial nephrectomy was queried using Pubmed engine search. The most relevant articles were analyzed and served as a basis for this work. RESULTS: The literature on complications of radical and partial nephrectomy has a low level of evidence. There are only retrospective series. The most frequent complications of radical nephrectomy occur during surgery in 5-10% of the cases: wound of the pedicle or of an adjacent organ. The management can often be conservative. Laparoscopy has a similar morbidity compare to the open approach but has greatly increased postoperative outcomes and comfort. Partial nephrectomy has a 20% complication rate. Many factors have an impact on the risk of complications (tumor size, inflammation of perirenal fat, access, surgeon experience, centre volume, comorbidities and age of the patient) and must be taken into consideration before advising partial nephrectomy. The two most feared complications of partial nephrectomy are bleeding (per- or postoperative, 10% of the cases) and urinary fistula (<5% of the cases). Robotic assistance is associated with a lower morbidity in many publications. CONCLUSION: Complications after partial and radical nephrectomy are quite frequent but have decreased with the improvement of surgical techniques. French urologists should maintain their interest in novel technologies and simplification of perioperative pathway to further improve patients' outcomes.

[Complications in urological surgery: Bladder surgery]. / Les complications chirurgicales en urologie adulte : chirurgie de la vessie.

CONTEXT-OBJECTIVE: The management of bladder tumors is based on two major interventions, the risks of complications of which can be significant. The objective of this work is to provide an update on the complications related to bladder surgery, to detail the preventive measures and management strategies in practice. METHODS: Bibliographic search using Medline bibliographic database (Pubmed) using the following keywords: transurethral resection of the bladder, cystectomy, neobladder, Bricker, complications, anastomotic strictures. RESULTS: Trans-urethral resection of the bladder (TURB) essentially exposes to the risk of hemorrhage (2 to 4%) and bladder perforation (1 to 3%). Total cystectomy is associated with significant morbidity and mortality, despite recent technical advances. The most frequent early complications are ileus (23 to 30%) and infectious complications (29 to 38%). Late complications included by functional complications (urinary and sexual), anastomotic strictures (7 to 12%), metabolic complications of continent derivation (25 to 46%) and stomial complications in case of non-continent derivation. The management of complications is well codified. It is however essential to anticipate and put in place preventive measures, especially for infectious and thromboembolic complications, including an exhaustive pre-operative assessment, prehabilitation of the patient and enhanced recovery after surgery. CONCLUSION: Preventing, analyzing and understanding complications in bladder surgery is essential to reduce mortality and morbidity.

[Complications in urological surgery: Prostate surgery]. / Les complications chirurgicales en urologie adulte : chirurgie de la prostate.

Prostate surgery mainly addresses the treatment of the two most common pathologies of the prostate: benign prostatic hypertrophy (BPH), symptomatic or complicated, and prostate cancer (PCa). The objective of this manuscript was to present after review of the literature the main intraoperative and postoperative surgical complications associated with radical prostatectomy and surgery of the BPH whatever the surgical approach. The incidence and type of these complications may vary depending on the patient's comorbidities and the type of surgery. Regarding radical prostatectomy, the main complications are hemorrhagic, digestive and urinary. During or after surgery of BPH, hemorrhagic and urinary complications dominate. The management of these complications relies on general principles based on a low level of evidence, but usually associate a structured diagnostic pathway and an appropriate treatment decision.

[Complications in endourology: Ureteroscopy and percutaneous nephrolithotomy]. / Complications en endo-urologie : urétéroscopie et néphrolithotomie percutanée.

If surgical treatment of urinary stones is indicated, the urologist has now different modalities depending on each situation. This includes extracorporeal lithotripsy, ureteroscopy (rigid and flexible), and percutaneous nephrolithotomy. Ureteroscopy is also performed for diagnostic purposes, and for the treatment of upper urinary tract tumors. Indications, as well as the steps of each of these techniques will not be discussed in this review. Only intra- and postoperative complications of ureteroscopy and percutaneous nephrolithotomy will be reviewed, including diagnostic, management, and preventive measures.

[Surgical complications in adult urology: Pelvic and perineal surgery]. / Les complications chirurgicales en urologie adulte : chirurgie du pelvis et du périnée.

Pelvic and perineal surgeries and in particular those for stress urinary incontinence and prolapse are functional surgeries, which require careful selection of patients and assessment of discomfort to expect satisfactory surgical results and reduce failure rates and of complications. Before offering pelvic and perineal surgery, the risk of potential complications should be carefully assessed and discussed with patients. Recent attention to the potential complications prosthetic mesh has raised awareness in the urological community to report complications. This chapter will focus on the complications of surgeries used for stress urinary incontinence (synthetic retropubic or transobturator suburethral slings, colposuspension, pubovaginal slings, artificial urinary sphincter, adjustable periurethral balloons and periurethral injections of bulking agents) and sacrocolpopexies. The epidemiology of complications, the minimum assessment to be carried out, treatment and prevention will be discussed.

[Surgical complications in adult urology: Surgery of the external genitalia]. / Les complications chirurgicales en urologie adulte : chirurgie des organes génitaux externes.

AIM: Define and present the complications of surgery of the external genitalia (EG), as well as their management. METHOD: Bibliographic search using the Medline (NLM Pubmed tool) and Embase bibliographic databases using the following keywords: scrotal surgery, orchidopexy, hydrocele, varicocele, testicular biopsy, vasectomy, cryptorchidism, orchiectomy, testicular implant, subcapsular orchiectomy, spermatic cord cyst, posthectomy, penis curvature surgery, penile implant, urethral strictures. RESULTS: EG surgery is common in urology, it includes scrotal surgeries and penile surgeries, which are performed openly. They expose to complications such as bleeding, infection, scar disunity requiring early reassessment especially in case of ambulatory procedure. Rare complications must be known, some of which must lead to expert management. CONCLUSION: Complications of surgical treatment of EG should be identified and managed. This report should allow a better understanding and management of these complications.

[Complications in urological surgery. The urologist as a player in risk management]. / Les complications en chirurgie urologique. L'urologue acteur de la gestion des risques.

The first part of this article deals with accreditation of the quality of the professional practice of urologists and medical teams working in public or private health care institutions. This is a voluntary national risk management process based on the reporting and analysis of medical risk events and the development and implementation of recommendations. The fundamental objective of the system is to reduce the frequency and severity of adverse events associated with care for the patient. The second part aims to describe the mechanisms and management of surgical complications. The perception of complications by the urologist is discussed, as it may be distorted by cognitive biases leading to inappropriate actions. Two important points were also emphasized: communication with the patient following an injury, therapeutic hazard or complication following an error, and proper maintenance of the medical record. A joint effort to cultivate a culture of safety and quality in urological surgical practice should be encouraged. Collective actions by urologists in the future should help to maintain a proactive attitude: - generalization of quality accreditation of urologic physicians' professional practice; - national registry: which has demonstrated its advantages in the world of aeronautics; - creation of a specific module "Management of complications in urology" in teaching (ECU) and continuing education (SUC, website); - creation of an AFU "Complications" Committee; - management of social networks.

Contrast-enhanced CT texture analysis for the prediction of delayed graft function following kidney transplantation from cadaveric donors.

OBJECTIVE: Delayed graft function (DGF) is a common complication after transplantation of deceased donor kidneys. The aim of this study was to investigate the feasibility of using computed tomography texture analysis (CT-TA) of the donor kidney to predict delayed graft function (DGF) following kidney transplantation from cadaveric donors. MATERIALS AND METHODS: We made a retrospective review of all consecutive DBD and DCD kidney donors admitted to our institution and their corresponding KTRs between December 2014 and January 2019. We extracted 15 image features from unenhanced CT and contrast-enhanced CT corresponding to first order and second order Haralick textural features. Predictors of DGF were evaluated by univariable and multivariable analysis. Receiver operating characteristic (ROC) analysis was performed and the area under the ROC curve (AUC) to predict DGF was calculated for the predictors. RESULTS: A total of 115 patients were included in the study. DGF occurred in 15 patients (13%). Recipient body mass index (BMI) (P=0.003) and Skewness (P=0.05) represented independent predictors in the multivariate model. The combination of both clinical and textural features in a bivariate model reached a ROC-AUC of 0.79 (95% CI: 0.64-0.94) in predicting the probability of DGF. CONCLUSION: Results from this preliminary study suggest that CT texture analysis might be a promising quantitative imaging tool to help physician predict DFG after kidney transplantation from cadaveric donors. LEVEL OF EVIDENCE: 4/5.

[Renal cell carcinoma of the kidney transplant: The French guidelines from CTAFU]. / Recommandations françaises du Comité de transplantation de l'association française d'urologie (CTAFU) : Carcinome à cellules rénales du transplant rénal.

OBJECTIVE: To propose recommendations for the management of renal cell carcinomas (RCC) of the renal transplant. METHOD: Following a systematic approach, a review of the literature (Medline) was conducted by the CTAFU to evaluate prevalence, diagnosis and management of RCC arousing in the renal transplant. References were assessed according to a predefined process to propose recommendations with levels of evidence. RESULTS: Renal cell carcinomas of the renal transplant affect approximately 0.2% of recipients. Mostly asymptomatic, these tumors are mainly diagnosed on a routine imaging of the renal transplant. Predominant pathology is clear cell carcinomas but papillary carcinomas are more frequent than in general population (up to 40-50%). RCC of the renal transplant is often localized, of low stage and low grade. According to tumor characteristics and renal function, preferred treatment is radical (transplantectomy) or nephron sparing through partial nephrectomy (open or minimally invasive approach) or thermoablation after percutaneous biopsy. Although no robust data support a switch of immunosuppressive regimen, some authors suggest to favor the use of mTOR inhibitors. CTAFU does not recommend a mandatory waiting time after transplantectomy for RCC in candidates for a subsequent renal tranplantation when tumor stage

[Renal cell carcinoma in candidates for renal transplantation and recipients of a kidney transplant: The French guidelines from CTAFU]. / Recommandations françaises du Comité de transplantation de l'association française d'urologie (CTAFU) : carcinome rénal sur reins natifs chez le patient transplanté rénal ou en attente de transplantation.

OBJECTIVE: To define guidelines for the management of renal cell carcinoma of the native kidney (NKRCC) in kidney transplant (KTx) recipients and renal cell carcinoma (RCC) in end-stage renal disease (ESRD) patients candidates for renal transplantation. METHOD: A review of the literature following a systematic approach (Medline) was conducted by the CTAFU to report renal cell carcinoma epidemiology, screening, diagnosis and management in KTx candidates and recipients. References were assessed according to a predefined process to propose recommendations with the corresponding levels of evidence. RESULTS: ESRD patients are at higher risk of RCC with a standardized incidence ratio of approximately 4,5 as compared with general population. NKRCC tumors occur in 1 to 3 % of KTx recipients with a 10 to 15-fold increased risk as compared with general population, especially in patients with acquired multicystic kidney disease. Most authors suggest yearly monitoring of the native kidneys using ultrasound imaging. Radical nephrectomy (either open or laparoscopic approach) is the preferred treatment of NKRCC in KTx recipients and RCC in ESRD. Surveillance in a valid option in small or cystic renal masses. In the localized setting, change in immunosuppressive therapy is not recommended besides perioperative avoidance of mTOR inhibitor to limit morbidity. CTAFU does not recommend a mandatory waiting time after nephrectomy for RCC in ESRD patients candidates for renal tranplantation when tumor stage

[French ccAFU guidelines - update 2020-2022: management of kidney cancer]. / Recommandations françaises du Comité de cancérologie de l'AFU ­ actualisation 2020­2022 : prise en charge du cancer du rein.

OBJECTIVE: - To update the French guidelines on kidney cancer. METHODS: - A systematic review of the literature between 2015 and 2020 was performed. The most relevant articles regarding the diagnosis, the classification, surgical treatment, medical treatment and follow-up of kidney cancer were retrieved and included in the new guidelines. The guidelines were updated with corresponding levels of evidence. RESULTS: - Thoraco-abdominal CT scan with injection is the best radiological exam for the diagnosis of kidney cancer. MRI and contrast ultra-sound can be useful in some cases. Percutaneous biopsy is recommended when histological results will affect clinical decision. Renal tumours must be classified according to pTNM 2017 classification and ISUP grade. Metastatic kidney cancers must be classified according to IMDC criteria. Partial nephrectomy is the recommended treatment for T1a tumours and can be done through an open, laparoscopic or robotic access. T1b tumours can be treated by partial or total nephrectomy according to tumour complexity. Radical nephrectomy is the recommended treatment of advanced localized tumours. There is no recommended adjuvant treatment. In metastatic patients: cyto-reductive nephrectomy can be offered in case of good prognosis; medical treatment must be counseled first in case of intermediate or bad prognosis. Surgical or local treatment of metastases should be considered in case of solitary lesion or oligo-metastases. First line recommended drugs in metastatic patients include the associations axitinib/pembrolizumab and nivolumab/ipilimumab. Cystic tumours must be classified according to Bosniak Classification. Surgical excision should be offered to patients with Bosniak III and IV lesions. It is recommended to follow patients clinically and with imaging according to tumour aggressiveness. CONCLUSION: - These updated recommendations should assist French speaking urologists for their management of kidney cancers.

Prognostic factors after adrenalectomy for adrenal metastasis.

PURPOSE: Very few studies have sought prognostic factors after adrenalectomy for metastasis. The aim of this study was to assess prognostic factors for oncological outcomes after adrenalectomy for adrenal metastasis. METHODS: All adrenalectomies for metastases performed in seven centers between 2006 and 2016 were included in a retrospective study. Recurrence-free survival (RFS) and cancer-specific survival (CSS) were estimated using the Kaplan-Meier method. Prognostic factors for CSS and RFS were sought by Cox regression analyses. RESULTS: 106 patients were included. The primary tumors were mostly renal (47.7%) and pulmonary (32.3%). RFS and CSS estimated rates at 5 years were 20.7% and 63.7%, respectively. In univariate analysis, tumor size (HR 3.83; p = 0.04) and the metastasis timing (synchronous vs. metachronous; HR 0.47; p = 0.02) were associated with RFS. In multivariate analysis, tumor size (HR 8.28; p = 0.01) and metastasis timing (HR 18.60; p = 0.002) were significant factors for RFS. In univariate analysis, the renal origin of the primary tumor (HR 0.1; p < 0.001) and the disease-free interval (DFI; HR 0.12; p = 0.02) were associated with better CSS, positive surgical margins with poorer CSS (HR 3.4; p = 0.01). In multivariate analysis, the renal origin of the primary tumor vs. pulmonary (HR 0.13; p = 0.03) and vs. other origins (HR 0.10; p = 00.4) and the DFI (HR 0.01; p = 0.009) were prognostic factors for CSS. CONCLUSION: In this study, tumor size and synchronous occurrence of the adrenal metastasis were associated with poorer RFS. Renal origin of the primary tumor and longer DFI were associated with better CSS. These prognostic factors might help for treatment decision in the management of adrenal metastasis.

[Recommendations CCAFU on the management of cancers of the urogenital system during an epidemic with Coronavirus COVID-19]. / Recommandations CCAFU sur la prise en charge des cancers de l'appareil urogénital en période d'épidémie au Coronavirus COVID-19.

AIM: The French population is facing the COVID-19 pandemic and the health system have been reoriented in emergency for the care of patients with coronavirus. The management of cancers of the urinary and male genital tracts must be adapted to this context. MATERIAL AND METHOD: An expert opinion documented by a literature review was formulated by the Cancerology Committee of the French Association of Urology (CCAFU). RESULTS: The medical and surgical management of patients with any cancers of the urinary and male genital tracts must be adapted by modifying the consultation methods, by prioritizing interventions according to the intrinsic prognosis of cancers, taking into account the patient's comorbidities. The protection of urologists from COVID-19 must be considered. CONCLUSION: The CCAFU issues an expert opinion on the measure to be taken to adapt the management of cancers of the male urinary and genital tract to the context of pandemic by COVID-19.

Pain intensity and imaging at the initial phase of acute pyelonephritis.

OBJECTIVE: To identify predictive factors of urological complication on imaging findings in women with pyelonephritis aged 18 to 65 years. METHODS: We performed an observational, retrospective, single-center study. The medical charts of women diagnosed with pyelonephritis at the emergency department from 2010 to 2015 were reviewed. Only patients who underwent an imaging study at the emergency department and with microbiologically confirmed pyelonephritis were included for analysis. The primary endpoint was the presence of urological complications on imaging findings. The secondary endpoint was treatment changes after imaging diagnosis. RESULTS: Of the 193 women enrolled, 88 (45.6%) had urological complication(s) on imaging findings. The multivariate analysis revealed that history of urolithiasis (OR=2.41; P=0.01) and pain requiring morphine use (OR=5.29; P=0.009) were predictive of urological complications on imaging findings. Of the 120 women with uncomplicated pyelonephritis who underwent imaging studies, 45% had urological complication, resulting in a treatment change in 36.7% of patients. The multivariate analysis revealed that age>40 years (OR=4.58; P=0.02) and pain requiring morphine use (OR=3.78; P=0.02) were predictive of urological complication(s) on imaging findings and of treatment change based on imaging findings (OR=6.76; P=0.005 and OR=4.19; P=0.01 respectively) in this subgroup. CONCLUSIONS: Pain requiring morphine use, age, and history of urolithiasis are independent predictors of urological complications on imaging findings in patients with acute pyelonephritis.

RNA profiling of human testicular cells identifies syntenic lncRNAs associated with spermatogenesis.

STUDY QUESTION: Is the noncoding transcriptional landscape during spermatogenesis conserved between human and rodents? SUMMARY ANSWER: We identified a core group of 113 long noncoding RNAs (lncRNAs) and 20 novel genes dynamically and syntenically transcribed during spermatogenesis. WHAT IS KNOWN ALREADY: Spermatogenesis is a complex differentiation process driven by a tightly regulated and highly specific gene expression program. Recently, several studies in various species have established that a large proportion of known lncRNAs are preferentially expressed during meiosis and spermiogenesis in a testis-specific manner. STUDY DESIGN, SIZE, DURATION: To further investigate lncRNA expression in human spermatogenesis, we carried out a cross-species RNA profiling study using isolated testicular cells. PARTICIPANTS/MATERIALS, SETTING, METHODS: Human testes were obtained from post-mortem donors (N = 8, 51 years old on average) or from prostate cancer patients with no hormonal treatment (N = 9, 80 years old on average) and only patients with full spermatogenesis were used to prepare enriched populations of spermatocytes, spermatids, Leydig cells, peritubular cells and Sertoli cells. To minimize potential biases linked to inter-patient variations, RNAs from two or three donors were pooled prior to RNA-sequencing (paired-end, strand-specific). Resulting reads were mapped to the human genome, allowing for assembly and quantification of corresponding transcripts. MAIN RESULTS AND THE ROLE OF CHANCE: Our RNA-sequencing analysis of pools of isolated human testicular cells enabled us to reconstruct over 25 000 transcripts. Among them we identified thousands of lncRNAs, as well as many previously unidentified genes (novel unannotated transcripts) that share many properties of lncRNAs. Of note is that although noncoding genes showed much lower synteny than protein-coding ones, a significant fraction of syntenic lncRNAs displayed conserved expression during spermatogenesis. LARGE SCALE DATA: Raw data files (fastq) and a searchable table (.xlss) containing information on genomic features and expression data for all refined transcripts have been submitted to the NCBI Gene Expression Omnibus under accession number GSE74896. LIMITATIONS, REASONS FOR CAUTION: Isolation procedures may alter the physiological state of testicular cells, especially for somatic cells, leading to substantial changes at the transcriptome level. We therefore cross-validated our findings with three previously published transcriptomic analyses of human spermatogenesis. Despite the use of stringent filtration criteria, i.e. expression cut-off of at least three fragments per kilobase of exon model per million reads mapped, fold-change of at least three and false discovery rate adjusted P-values of less than <1%, the possibility of assembly artifacts and false-positive transcripts cannot be fully ruled out. WIDER IMPLICATIONS OF THE FINDINGS: For the first time, this study has led to the identification of a large number of conserved germline-associated lncRNAs that are potentially important for spermatogenesis and sexual reproduction. In addition to further substantiating the basis of the human testicular physiology, our study provides new candidate genes for male infertility of genetic origin. This is likely to be relevant for identifying interesting diagnostic and prognostic biomarkers and also potential novel therapeutic targets for male contraception. STUDY FUNDING/COMPETING INTEREST(S): This work was supported by l'Institut national de la santé et de la recherche médicale (Inserm); l'Université de Rennes 1; l'Ecole des hautes études en santé publique (EHESP); INERIS-STORM to B.J. [N 10028NN]; Rennes Métropole 'Défis scientifiques émergents' to F.C (2011) and A.D.R (2013). The authors have no competing financial interests.

Long-term oncological outcomes of cystic renal cell carcinoma according to the Bosniak classification.

OBJECTIVES: To evaluate the prognostic role of the Bosniak classification on the long-term oncological outcomes of cystic renal cell carcinomas. MATERIAL AND METHOD: In a national multicentric retrospective study, we included patients treated surgically for localized cystic RCC from 2000 to 2010. Patients with a follow-up of less than 4 years, benign tumors, and ablative treatments were excluded. The primary outcome was disease-free survival. RESULTS: 152 patients met the inclusion criteria: Bosniak II (6%), III (53%), IV (41%), with a median follow-up of 61 (12-179) months. Characteristics of the population and the tumors were [median, (min-max)] age 57 (25-84) years old, tumor size 43 mm (20-280), RENAL score 7 (4-12), PADUA score 8 (5-14). Treatments were 55% partial nephrectomy, 45% radical nephrectomy, 74% open surgery, and 26% laparoscopy. In pathological report, cystic RCC were mainly of low grade (1-2, 77%) and low stage (pT1, 81%). The two main histological subtypes were conventional (56%) and papillary (23%) RCC. Staging at presentation and histological characteristics were similar between Bosniak III and IV, except for high grade which was more common in Bosniak IV (12 vs 36%, p < 0.01). The Bosniak classification was not predictive of the recurrence, as 5- and 10-year disease-free survival were similar in Bosniak III and IV (92% vs 92% and 84% vs 83%, p = 0.60). CONCLUSION: The Bosniak classification is predictive of the risk of malignancy but not of the oncological prognosis. Regardless of the initial Bosniak categories, almost all cystic RCCs were of low stage/grade and had low long-term recurrence rate.