Tabaquismo y tumores mayores de 2 centímetros son predictores de mortalidad en pacientes sometidos a nefro-ureterectomías por carcinoma de urotelio alto / Prognostic factors in patients with upper urinary tract urothelial carcinoma undergoing nephro-ureterectomy

BACKGROUND: Upper urinary tract urothelial carcinoma (UTUC) represents 5-10% of urothelial carcinomas. It is managed with nephroureterectomy (NUR); however, kidney-sparing techniques are growingly used. AIM: To report the results of a 20-year series of NUR conducted in an academic center. Patients and Methods: Review of clinical and pathological characteristics of patients undergoing NUR between 1999 and 2020. Patients were followed for 63 months. Global survival curves (OS) and mortality predictors were established through Cox regression. RESULTS: We included 90 patients with a median age of 68 years undergoing NUR, of whom 68 (75%) had a pelvic tumor and 22 (25%) had a proximal ureteral tumor. A laparoscopic NUR was performed in 60 patients (66%). Thirty-three patients (37%) had tumors confined to the urothelium (pTa), penetrating the lamina propria (pT1) or carcinoma in situ (CIS), 10 patients (11%) had a tumor spreading to the muscle layer (pT2) and 47 (52%) had a tumor spreading to nearby organs (pT3 / T4). Average tumor size was 3.69 cm, nodal disease (pN) was present 12 patients (13%). Twelve patients (13%) received adjuvant chemotherapy. A higher mortality was observed among smokers (Hazard ratio (HR) 8.79, 95% confidence intervals (CI) 1.5-49.0, p = 0.01), patients with tumors classfied as pT≥ 2 (HR 1.09, 95% CI 0.01-1.0, p = 0.04) and those with tumors larger than 2 cm (HR 14.79, CI 95% 1.5-272, p = 0.01). CONCLUSIONS: Smoking patients, those with invasive tumors (T2-T4) and greater than 2 cm have higher mortality. Therefore, they should not be candidates for conservative management.

Simultaneous laparoscopic nephroureterectomy and robot-assisted anterior pelvic exenteration with intracorporeal ileal conduit urinary diversion: step-by-step video-illustrated technique

ABSTRACT Introduction: One of the most remarkable characteristics of urothelial carcinomas is multifocality. However, occurrence of synchronous bladder cancer and upper urinary tract urothelial cancer (UTUC) is exceptional. Minimally invasive approach for these synchronous tumors was just occasionally reported (1-4). The aim of this video article is to describe step-by-step the technique for simultaneous laparoscopic nephroureterectomy and robot-assisted anterior pelvic exenteration with intracorporeal ileal conduit urinary diversion (ICUD). Patients and methods: A 66-year-old female presented with synchronous BCG refractory non-muscle invasive bladder cancer and a right-side UTUC. She was a former smoker and had previously been submitted to multiple transurethral resections of bladder tumor, BCG and right distal ureterectomy with ureteral reimplant. We performed a simultaneous laparoscopic right nephroureterectomy and robot-assisted anterior pelvic exenteration with totally intracorporeal ICUD. Combination of robot-assisted and pure laparoscopic approaches was proposed focusing on optimization of total operative time (TOT). Results: Surgery was uneventful. TOT was of 330 minutes. Operative time for nephroureterectomy, anterior pelvic exenteration and ICUD were 48, 135, 87 minutes, respectively. Estimated blood loss was 150mL. Postoperative course was unremarkable and patient was discharged after 7 days. Histopathological evaluation showed a pT1 high grade urothelial carcinoma plus carcinoma in situ both in proximal right ureter and bladder, with negative margins. Twelve lymph nodes were excised, all of them negative. Conclusion: In our preliminary experience, totally minimally invasive simultaneous nephroureterectomy and cystectomy with intracorporeal ICUD is feasible. Pure laparoscopic approach to upper urinary tract may be a useful tactic to reduce total operative time.

Retrograde pyelography before radical nephroureterectomy for upper tract urothelial carcinoma is associated with intravesical tumor recurrence

ABSTRACT Purpose: To investigate the association between preoperative retrograde pyelography (RGP), conducted to evaluate upper tract urothelial carcinoma (UTUC), and intravesical recurrence (IVR) after radical nephroureterectomy (RNU). Materials and Methods: Of 114 patients that underwent RNU, 72 patients without preoperative ureteroscopy and a history of bladder tumor were selectively enrolled. Variables associated with IVR were identified. Results: RGP was performed at a mean duration of 24.9 days prior to RNU in 41 (56.1%) of study subjects. During the mean follow-up period of 64.5 months, IVRs were identified in 32 (44.4%) patients at 22.3±18.8 (mean±SD) months after RNU. Despite similar tumor characteristics in the RGP and non-RGP groups, the incidence of IVR was considerably higher in the RGP group (63.4%) than in the non-RGP group (19.4%, p <0.001). The following variables differed significantly between the IVR and non-IVR groups: age (64.6±8.51 vs. 59.6±9.65 years), tumor location (lower or upper; 53.1% vs. 20%), tumor invasiveness (> pT2; 53.1% vs. 17.5%), preoperative hemoglobin (12.8±1.36 vs. 13.9±1.65), preoperative creatinine (1.29±0.32 vs. 1.11±0.22), and preoperative RGP (81.3% vs. 37.5%), respectively. Multivariate Cox regression model showed that tumor location (p=0.020, HR=2.742), preoperative creatinine level (p=0.004, HR=6.351), and preoperative RGP (p=0.045, HR=3.134) independently predicted IVR. Conclusion: Given the limitations of retrospective single-center series, performance of RGP before RNU was shown to have a negative effect on IVR after surgery.

Evaluating the impact of preoperative anemia on the prognosis of upper tract urothelial carcinoma following radical nephroureterectomy: A single-center retrospective study of 686 patients / 北京大学学报(医学版)

OBJECTIVE@#To identify the effect of preoperative anemia on the prognosis of patients with upper tract urothelial carcinoma (UTUC) following radical nephroureterectomy.@*METHODS@#Clinicopathological and prognosis data on 686 patients with UTUC who underwent RNU at Peking University First Hospital between January 2000 and December 2013 were retrospectively analyzed. Preoperative anemia was defined as hemoglobin <130 g/L in men and <120 g/L in women based on the World Health Organization classification. The Kaplan-Meier method with log-rank test was applied to estimate the effect of anemia on survival. The associations of clinicopathologic features with overall survival and cancer-specific survival were evaluated using univariate and multivariate Cox regression models.@*RESULTS@#There were 303(44.2%, 303/686) male and 383(55.8%, 383/686) female patients, and the median age was 68 years (interquartile range: 60-74 years). In all, 320 (46.6%, 320/686) patients were anemic before surgery. The median follow-up duration was 47 months. In all, 160 (23.3%) patients died, 141 (20.6%) died of cancer and 19 (2.7%) died of other disease or accidents. Preoperative anemia was associated with gender (P=0.002), age (P<0.001), lymph node positive (P=0.026), increased tumor grade (P=0.018), concomitant carcinoma in situ (P=0.038), tumor necrosis (P=0.007) and poor renal function (P<0.001). In univariate analysis, overall mortality was correlated with pre-operative anemia (P<0.001), gender (P=0.009), hydronephrosis (P=0.024), tumor stage (P<0.001), lymph node positive (P<0.001), tumor grade (P<0.001), tumor architecture(P<0.001), sarcomatoid differentiation (P=0.013), history of ureteroscope (P=0.033) and tumor hemorrhage (P<0.001); cancer-specific mortality was correlated with preoperative anemia (P=0.001), gender (P=0.001), hydronephrosis (P=0.043), tumor stage (P<0.001), lymph node positive (P<0.001), tumor grade (P<0.001), tumor architecture (P<0.001), sarcomatoid differentiation (P=0.016), history of ureteroscope (P=0.028) and tumor hemorrhage (P=0.003). A multivariate Cox proportional hazards model indicated that preoperative anemia was an independent prognositic predictor for overall mortality (P<0.001, HR=1.861) and cancer-specific mortality (P=0.003, HR=1.688).@*CONCLUSION@#The preoperative anemia is an independent risk factor for cancer-specific survival and overall survival. Hemoglobin levels should be considered during patient counseling and in decision-making for further therapy.

Impact of diagnostic ureteroscopy and biopsy on radical nephroureterectomy of upper tract urothelial carcinoma / 北京大学学报(医学版)

OBJECTIVE@#To investigate the impact of preoperative diagnostic ureteroscopy and biopsy (UB) on radical nephroureterectomy (RNU) and the prognosis of upper tract urothelial carcinoma (UTUC).@*METHODS@#The clinical data of UTUC patients receiving RNU between Jan. 2007 and Dec. 2016 were retrospectively collected. The median follow up time was 40 months. The operation time and blood loss of RNU were compared between UB group and non-UB group. Subgroup analyses were conducted according to the time interval between UB and RNU, and surgery methods of lower ureter. The linear regression model was used to adjust for other common factors that impacted operation time.@*RESULTS@#A total of 163 UTUC patients were included in the final analysis. For the lower ureter, open ureterectomies were performed in 91 patients (55.9%), while retroperitoneal laparoscopic ureterectomies were performed in 72 patients (44.1%). A total of 110 (67.5%) patients received preoperative UB. Compared with non-UB group, the average operation time of UB group was significantly longer [(252.5±79.8) min vs. (221.3±79.8) min, P=0.019], but no difference of blood loss was found (median, 50 mL vs. 50 mL, P=0.143). In subgroup analysis, the average operation time of RNU was significantly prolonged when RNU was performed after 1 week of UB (P=0.023). Meanwhile, the median blood loss of RNU increased significantly when it was done after 2 weeks of UB compared with non-UB group (100 mL vs. 50 mL, P=0.012). UB was also significantly prolonged the operation time of RNU in retroperitoneal laparoscopic ureterectomy group (P=0.012). In multivariable analysis, UB (P=0.049), ≥pT3 (P=0.039), pN+ (P=0.018) and ureterectomy method (P=0.005) were independent risk factors of prolonged operation time. The 3-year cancer specific survival (CSS) rate was 87.2% in our cohort. UB had no significant impact on cancer specific survival (P=0.435).@*CONCLUSION@#UB was an independent risk factor of prolonged RNU time, but did not significantly influence cancer specific survival of upper tract urothelial carcinoma patients.

Comparison of efficacy and safety between two different methods of nephroureterectomy in two centers / 北京大学学报(医学版)

OBJECTIVE@#To compare the efficacy and safety of complete transperitoneal laparoscopic nephroureterectomy (CTNU) and traditional retroperitoneoscopic nehroureterectomy (TRNU) for the management of upper urinary tract urothelial carcinoma(UTUC).@*METHODS@#We retrospectively collected the clinical data of UTUC patients who underwent CTNU or TRNU surgery from January 2011 to December 2018 in Peking University First Hospital and Fujian Provincial Hospital, and compared the clinical characteristics, perioperative parameters, and follow-up results between the CTNU and TRNU surgeries.@*RESULTS@#Finally, a total of 266 cases were included, with 94 cases in the CTNU group and 172 cases in the TRNU group. The proportion of left side lesions was bigger in TRNU group when compared with CTNU group (P<0.05). No significant differences were observed in clinical characteristics, such as age, gender, body mass index (BMI), American society of anesthesiologists score (ASA score) and tumor laterality. All surgery procedures were completed. The vascular resparing was performed by reason that left arteria renalis was injured accidently during surgical operation in one case of TRNU group. No serious complications were observed in both CTNU and TRNU groups. In CTNU group, operating time was (202.9±76.7) min, estimated blood loss was (68.4±73.3) mL, drainage duration was (3.9±1.5) d, drainage volume was (181.7±251.5) mL, and postoperative hospital stay was (7.8±4.1) d. In TRNU group, operating time was (203.5±68.7) min, estimated blood loss was (130.2±252.1) mL, drainage duration was (4.3 ±1.6) d, drainage volume was (179.1±167.5) mL, and postoperative hospital stay was (8.2±3.7) d. The estimated blood loss in CTNU group was significantly less than that in TRNU group (P=0.005).The median follow-up time was 39 months (range: 1-88 months). The 5-year overall survival rate (OS), cancer specific survival rate (CSS), intra-vesical recurrence free survival rate (IvRFS), disease free survival rate (DFS) of CTNU group was 75.6%, 86.9%, 73.8%, 57.5%, respectively. The OS, CSS, IvRFS and DFS of TRNU group was 66.3%, 83.5%, 75.9%, 58.6%, respectively.No significant differences were observed in the OS, CSS, IvRFS and DFS between the CTNU and TRNU groups.@*CONCLUSION@#CTNU technique is a safe and effective surgical option, and further prospective randomized controlled trial is needed for further evaluation.

Retroperitoneal laparoscopic nephroureterectomy with distal and intramural ureter resection for a tuberculous non - functional kidney

ABSTRACT Objective: To evaluate the safety and feasibility of total retroperitoneal laparoscopic nephroureterectomy with urinary-bladder junction resection for a tuberculous nonfunctional kidney. Materials and Methods: A total of 27 individuals diagnosed with unilateral nonfunctional kidney secondary to tuberculosis were treated between June 2011 and June 2015. All patients had normal renal function on the contralateral side and underwent the standard four-drug anti-tuberculosis treatment for at least four weeks before surgery. Total retroperitoneal laparoscopic nephroureterectomy was performed in all patients, and the urinary-bladder junction of distal ureter was managed using different auto-suture techniques. Results: Nineteen male and 8 female patients with an average age of 47.3 years (range, 36-64 years) underwent surgery. All the operations were successfully performed without conversion. The median operative time was 109.3 min (range, 75-138 min), the median blood loss was 157.5 mL (range, 70-250 mL), and the median hospitalization time was 3.7 days (range, 3-6 days). No serious perioperative complications occurred. Anti-tuberculosis chemotherapy was prescribed to all patients, with the entire course of treatment lasting six months. No recurrence of tuberculosis of the bladder or the contralateral kidney was observed during the median follow-up period of 26.7 months (range, 6-54 months). Conclusion: Retroperitoneal laparoscopic nephroureterectomy with urinary-bladder junction resection is a safe and feasible approach for the treatment of tuberculous non-functional kidneys.

Tissue-based molecular markers in upper tract urothelial carcinoma and their prognostic implications

ABSTRACT Upper tract urothelial carcinoma (UTUC) is a rare and aggressive disease that is associated with high rates of recurrence and death. Radical nephroureterectomy (RNU) with excision of the bladder cuff is considered the standard of care for high-risk UTUC, whereas kidney-sparing techniques can be indicated for select patients with low-risk disease. There is a significant lack of clinical and pathological prognostic factors for stratifying patients with regard to making treatment decisions. Incorporation of tissue-based molecular markers into prognostic tools could help accurately stratify patients for clinical decision-making in this heterogeneous disease. Although the number of studies on tissue-based markers in UTUC has risen dramatically in the past several years—many of which are based on single centers and small cohorts, with a low level of evidence—many discrepancies remain between their results. Nevertheless, certain biomarkers are promising tools, necessitating prospective multi-institution studies to validate their function.

Desarrollo de un checklist para la técnica de nefroureterolitototomía endoscópica flexible en un modelo simulado mediante el método de delphi modioficado / Development of a checklist for the technique of flexible endoscopic nephroureterlithotomy in a simulated model by the modifiet delphy method

Introducción: La simulación en medicina está cobrando cada vez mayor importancia, principalmente en el área quirúrgica, ya que nos otorga la posibilidad de lograr el aprendizaje de forma segura, bajo ambiente controlado y reproducible. Nuestro objetivo es establecer una pauta estructurada de realización de ureteroscopía flexible para un procedimiento simulado de nefro-ureterolitotomía endoscópica.Material y métodos. Se utilizó el método de Delphi modificado. Se contactó vía correo electrónico a cinco urólogos a los cuales se les envió un checklist para la evaluación de la técnica del procedimiento de 1 a 7, agregando comentarios. Basado en esto, se modifica el checklist en 2 oportunidades, hasta lograr el consenso.Resultados. Se obtiene una la versión definitiva del checklist. Esta consta de 20 puntos, con una media que fluctúa entre 5,6 y 7, y una mediana entre 6 y 7. El coeficiente de Cronbach para establecer su consistencia interna es de 0,86.Conclusión. Se establece un listado estándar para la realización de nefro-ureterolitotomíaendoscópica flexible utilizando el método de Delphi modificado.(AU)

Introduction: The simulation in medicine is becoming increasingly important, mainly in the surgical area, because it gives us the possibility to achieve learning safely, in a controlled and reproducible environment. Our objective is to establish a structured guideline of flexible ureteroscopy for a simulated endoscopic nephro ureterolithotomy procedure.Material y Methods. The modified Delphi method was used. Five urologists were contacted via email, a checklist was sent for the evaluation of the procedure technique from 1 to 7, adding comments. Based on this, the checklist is modified 2 times, until consensus is reached.Results. A final version of the checklist is obtained. It consists in 20 points, with a mean that fluctuates between 5.6 and 7, and a median between 6 and 7. The Cronbach coefficient to establish its internal consistency is 0, 86.Conclusion. A standard list is established using the modified Delphi method for the performance of flexible endoscopic nephro-ureterolithotomy.(AU)