Tumors Of Upper Urinary Tract Research Articles

Prospective evaluation of the RT-PCR based urinary marker Bladder Epicheck® as a diagnostic tool in upper urinary tract tumor.

Upper-tract-urothelial-carcinoma (UTUC) represents 5-10% of all urothelial-neoplasms with increasing incidence in the last decades. Current standard tools for diagnosis of UTUC include cytology, computed tomography (CT) urography and ureterorenoscopy (URS). The aim of this study was to evaluate the impact of Bladder Epicheck® Test as diagnostic tool for UTUC diagnosis and recurrence. Overall, 136 urine samples, selective collected from upper-urinary-tract before URS for suspicion of UTUC were analyzed with cytology and Bladder Epicheck® Test. Sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) of both markers were calculated and compared to URS and/or histology as reference. UTUC was detected in 40 cases (33.3%), among them 30 were classified as low-grade (LG) and 10 as high-grade (HG). Overall sensitivity of Bladder Epicheck® for UTUC detection was 65% compared to 42.5% for cytology, increasing to 100% for Bladder Epicheck® and 90% for cytology if considering only HG tumors. Overall specificity of Bladder Epicheck® was 81.2% and of cytology 93.7%. PPV and NPV were 63.4% and 82.2% for Bladder Epicheck® and 77.2% and 76.5% for cytology. Considering an EpiScore cut-off >75, instead of 60, specificity of Bladder Epicheck® improves to 89% and PPV to 74.2%. Limitations include the use of a marker validated only for bladder-cancer and the relatively small number of cases. Due to its high sensitivity for HG tumors, the Bladder Epicheck® Test can be used in diagnosis and treatment decision-making of UTUC. Furthermore, it could be very useful in follow-up of UTUC, after endoscopic treatment to postpone or avoid unnecessary endoscopic exploration. Even if further studies are needed to validate these findings, Bladder Epicheck® could be a promising clinical tool for detection of UTUC.

The impact of squamous cell transformation on the prognosis of patients treated with radical nephroureterectomy

Background Limited information is available for guiding the management of upper urinary tract (UUT) urothelial carcinoma with squamous differentiation (UC-SqD). We did not even know about the difference between pure urothelial carcinoma (UC) and UC-SqD in the UUT regardless of treatment policy and prognosis. Instead of direct comparisons against each other, we included the third UUT malignancy, squamous cell carcinoma (SCC). This three-way-race model allows us to more clearly demonstrate the impact of squamous cell transformation on patient outcomes in UUT malignancy.MethodsWe retrospectively analysed 327 patients with UC, UC-SqD, or SCC who underwent radical nephroureterectomy with bladder cuff excision (RNU) at Taichung Veterans General Hospital, Taichung, Taiwan, between January 2006 and December 2013. A Kaplan–Meier survival analysis was used to evaluate the relationship between patient outcomes and histology. Multivariate Cox proportional hazards modelling was also used to predict patient prognoses.ResultsThe five-year postoperative cancer-specific survival (CSS) rates were 83.6% (UC), 74.4% (UC-SqD), and 55.6% (SCC), and the 5-year recurrence-free survival (RFS) rates were 87.7% (UC), 61.5% (UC-SqD), and 51.9% (SCC). UC patients had significantly better 5-year RFS than UC-SqD and SCC patients (P = 0.001 and P < 0.0001, respectively). Patients with pure UC had significantly better 5-year CSS than SCC patients (P = 0.0045). SCC or UC-SqD did not independently predict disease-specific mortality (HR 0.999, p = 0.999; HR 0.775, p = 0.632, respectively) or disease recurrence compared to pure UC (HR 2.934, p = 0.239; HR 1.422, p = 0.525, respectively). Age, lymphovascular invasion (LVI), and lymph node (LN) status independently predicted CSS, while pathological tumour stage, LN status, and LVI predicted RFS.ConclusionsSCC and UC-SqD are not independent predictors of survival outcomes in patients with UUT tumours. However, they are associated with other worse prognostic factors. Hence, different treatments are needed for these two conditions, especially for SCC.

Robot-assisted radical nephroureterectomy for upper urinary tract tumor: initial experience with the use of novel surgical robot system, hinotori.

The hinotori surgical robot system is a promising robotic platform that has been recently introduced into routine clinical practice. The aim of this study was to report our initial experience of robot-assisted radical nephroureterectomy (RANU) using hinotori. This study included a total of eight patients with upper urinary tract tumor (UUTT) who underwent RANU using hinotori via the transperitoneal approach. In this series, nephrectomy was initially performed at the kidney direction stage followed by distal ureterectomy and bladder cuff excision at the bladder direction stage without repositioning of patient or port. Lymphadenectomy was performed at either stage. Median age, body mass index, and tumor diameter were 76 years, 21.7 kg/m2, and 13 mm, respectively. Of eight patients, three were diagnosed with renal pelvic tumors and five with lower ureteral tumors. They underwent lymphadenectomy targeting the renal hilum plus para-aorta and the pelvis, respectively. All procedures in this series were completed without conversion to open surgery. Median operative time, time using the robotic system, estimated blood loss, and length of hospital stay were 230 minutes, 138 minutes, 23 mL, and 8 days, respectively. No major perioperative complication occurred. Pathological examinations of the tumors revealed seven urothelial carcinomas and one papilloma, the median number of resected lymph nodes was 13, and one patient was positive for both cancer margin and lymph node metastases. Despite being a small case series, this is the first study characterizing RANU using the hinotori surgical robot system. RANU was efficaciously and safely performed, resulting in the achievement of favorable perioperative findings.

Occurrence and prognostic significance of different histology relative to urinary tract tumors: A SEER population-based study.

485 Background: To evaluate the prevalence and prognostic value of variant histology in urinary tract tumors according to primary location and metastatic status. Methods: Using the Surveillance, Epidemiology, and End Results registry (SEER, 2004-2015) databases, patients with urinary tract tumors were identified. Propensity Score Matching was used to balance the clinicopathologic features between different histologies. Kaplan-Meier plots were used to compare the cancer specific survival (CSS) and overall survival (OS) of different histologies. The cox regression analysis were also applied. Results: Of all 93,200 eligible patients with urinary tract tumors, 87,323 (93.7%) harbored bladder cancer (3,685 in M1 stage). Among them, urothelial tumors (UC) accounted for 96.67%, followed by squamous neoplasm (SCC), urachal carcinoma (Urachal), adenocarcinoma (Adeno), neuroendocrine tumors (NE) and tumor of Müllerian type (Müllerian). A total of 5877 (6.35%) harbored upper urinary tract tumors (950 in M1 stage). Among them, UC accounted for 96.39%, followed by SCC, Urachal, Müllerian, NE, Adeno. In patients with localized diseases, those with non-urothelial tumors had significantly worse prognosis in overall urinary tract tumors based on OS and CSS (P&lt;0.001). In terms of specific histology in bladder cancer (BC), patients with UC had most favorable prognosis, followed by Adeno, Urachal and Müllerian, while those with SCC and NE were associated with the worst survival outcomes. In patients with upper urinary tract tumors (UUTT), those with Müllerian had the best survival outcomes, followed by UC, while those with NE, Adeno, SCC, and Urachal had relatively worse prognosis. In M1 stage, although there was a statistical difference in OS and CSS between all patients with urothelial and non-urothelial tumors (P&lt;0.001), the 5-year survival rate (3.74%, 2.50%) and 5-year CSM (4.93%, 3.28%) were similar. In metastatic BC, there was no difference in OS among all histology. However, in terms of CSS, significant differences were still observed in patients with different histologies. In metastatic UUTT, no difference in survival was found among different histologies. After PSM, the similar results were observed in BC, while there is no statistical difference of survival among different histologies in UUTT, no matter the M stage. Cox analyses revealed that primary location, histology type, surgery, chemotherapy and M stage were the common and strong independent prognostic factors in both BC and UUTT. Conclusions: In urinary tract tumors, the incidence of different histology types between BC and UUTT is roughly similar. Overall, patient with variant histology have a worse prognosis than those with urothelial carcinoma. However, differences in survival among the histology types vary by primary location and metastatic status, especially the metastatic status.

Integrated molecular and pharmacological characterization of patient-derived xenografts from bladder and ureteral cancers identifies new potential therapies.

BackgroundMuscle-invasive bladder cancer (MIBC) and upper urinary tract urothelial carcinoma (UTUC) are molecularly heterogeneous. Despite chemotherapies, immunotherapies, or anti-fibroblast growth factor receptor (FGFR) treatments, these tumors are still of a poor outcome. Our objective was to develop a bank of patient-derived xenografts (PDXs) recapitulating the molecular heterogeneity of MIBC and UTUC, to facilitate the preclinical identification of therapies.MethodsFresh tumors were obtained from patients and subcutaneously engrafted into immune-compromised mice. Patient tumors and matched PDXs were compared regarding histopathology, transcriptomic (microarrays), and genomic profiles [targeted Next-Generation Sequencing (NGS)]. Several PDXs were treated with chemotherapy (cisplatin/gemcitabine) or targeted therapies [FGFR and epidermal growth factor (EGFR) inhibitors].ResultsA total of 31 PDXs were established from 1 non-MIBC, 25 MIBC, and 5 upper urinary tract tumors, including 28 urothelial (UC) and 3 squamous cell carcinomas (SCCs). Integrated genomic and transcriptomic profiling identified the PDXs of three different consensus molecular subtypes [basal/squamous (Ba/Sq), luminal papillary, and luminal unstable] and included FGFR3-mutated PDXs. High histological and genomic concordance was found between matched patient tumor/PDX. Discordance in molecular subtypes, such as a Ba/Sq patient tumor giving rise to a luminal papillary PDX, was observed (n=5) at molecular and histological levels. Ten models were treated with cisplatin-based chemotherapy, and we did not observe any association between subtypes and the response. Of the three Ba/Sq models treated with anti-EGFR therapy, two models were sensitive, and one model, of the sarcomatoid variant, was resistant. The treatment of three FGFR3-mutant PDXs with combined FGFR/EGFR inhibitors was more efficient than anti-FGFR3 treatment alone.ConclusionsWe developed preclinical PDX models that recapitulate the molecular heterogeneity of MIBCs and UTUC, including actionable mutations, which will represent an essential tool in therapy development. The pharmacological characterization of the PDXs suggested that the upper urinary tract and MIBCs, not only UC but also SCC, with similar molecular characteristics could benefit from the same treatments including anti-FGFR for FGFR3-mutated tumors and anti-EGFR for basal ones and showed a benefit for combined FGFR/EGFR inhibition in FGFR3-mutant PDXs, compared to FGFR inhibition alone.

Ureteral urothelial carcinoma with squamous cell carcinoma and sarcomatoid carcinoma differentiation: a case report

BackgroundUpper urinary tract urothelial carcinoma (UTUC) with multiple pathological types is extremely rare in the clinic, but the recurrence rate and mortality these patients are high. At present, there is no standard treatment for such cases.Case presentationWe reported a case of ureteral urothelial carcinoma with squamous cell carcinoma and sarcomatoid carcinoma differentiation and rapid ileal metastasis and reviewed the literature related to different pathological types of upper urinary tract tumours to explore the diagnosis, treatment and prognosis characteristics of the disease, enhance our understanding of its clinical manifestations and history of evolution and provide guidance for avoiding missed diagnosis and misdiagnosis.ConclusionThere is no standard treatment for urinary malignant tumours with multiple pathological types; radical surgery is considered a suitable choice. Chemotherapy, targeted drug therapy and immunotherapy may be beneficial to the survival of patients. In short, these patients have a high risk of recurrence and metastasis and a poor prognosis.

Conservative management of chylous leak after open radical nephrectomy in an adult patient: a case report and literature review

BackgroundChylous ascites is rare but still a recognized complication of retroperitoneal surgeries caused mostly by inadvertent trauma to lymphatic channels. In this article, we present a case report and literature review of adult patient, with malignant tumor of upper urinary tract, who developed chylous leak after open nephrectomy.Case presentationWe present a case of chylous leak for a 67-year-old female patient, presented to urology clinic with complaining of left loin pain and gross hematuria, found to have upper urinary tract tumor, she underwent open radical nephrectomy with lymph nodes dissection, and postoperatively she had chylous leak that is treated conservatively using octreotide and spironolactone without the need for total parenteral nutrition.ConclusionConservative management should always be the first choice of management of chylous leak and chylous ascites. Careful anatomical identification and securing of the periaortic lymphatics are needed to decrease the risk of postoperative chylous leak and ascites.

Upper Urinary Tract Tumors: Variant Histology Versus Urothelial Carcinoma.

To evaluate stage at presentation and cancer-specific mortality (CSM) in upper urinary tract tumors according to histologic subtype. Within the Surveillance, Epidemiology, and End Results registry (SEER, 2004-2016), we identified patients with upper urinary tract tumors with pure variant histology (UTVH) and pure upper urinary tract urothelial carcinoma (UTUC). Cumulative incidence plots, after propensity score matching for tumor and patient characteristics, addressed CSM. Subgroup analyses addressed efficacy of radical nephroureterectomy (RNU) in stage T1-2 and of chemotherapy in metastatic UTVH patients. Of all 11,809 upper urinary tract tumor patients, 154 (1.3%) harbored squamous cell carcinoma (SCC), 86 (0.7%) adenocarcinoma, 39 (0.3%) neuroendocrine carcinoma, 38 (0.3%) other UTVH, and 11,492 (97.3%) UTUC. UTVH patients were more likely to exhibit metastatic stage disease at diagnosis than UTUC (odds ratio, 1.9; 95% confidence interval, 1.3-2.8; P< .01). After detailed matching for performance status, only SCC showed significantly higher CSM than UTUC (multivariate HR= 1.71; P< .01). Subgroup analyses in stage T1-2 RNU patients showed, relative to UTUC patients, no CSM differences for SCC or adenocarcinoma patients. No significant survival benefit for chemotherapy administration was identified in patients with metastatic SCC or metastatic adenocarcinoma. This study is limited by its sample size and the missing centralized pathologic review. Disease stage at diagnosis is more advanced in UTVH patients than UTUC. Across all stages, CSM is higher for SCC than for UTUC. However, in T1-2 stage disease, RNU results in similar survival in SCC or adenocarcinoma versus UTUC.

PT338 - Feasability of the Epicheck test in upper urinary tract tumor: Interim analysis of a prospective trial

PT338 - Feasability of the Epicheck test in upper urinary tract tumor: Interim analysis of a prospective trial

Advantages of retrograde flexible ureteroscopy in determining the etiology of painless hematuria originating from the upper urinary tract.

The present study investigated the use of retrograde flexible ureteroscopy (RFU) in the discrimination of the etiology of hematuria that originates from the upper urinary tract (UUT). The present study collected retrospective data for patients who presented with hematuria and cystoscopy-detected bleeding from the UUT between June 2006 and August 2018 in Ningbo First Hospital. All patients accepted RFU to determine the etiology of hematuria. Data regarding imaging examinations, surgery, pathology and complications were also collected and analyzed. In total, 65 patients (males, 38; females, 27) with a mean age of 63 years underwent RFU to determine the etiology of hematuria originating from the UUT. Using RFU, UUT tumors were found in 29 cases. Stones, polyps and atypical hyperplasia were found in two cases, and a definite diagnosis was not found in three cases. There were 17 cases without obvious abnormalities and nine cases were unable to undergo RFU due to ureteral stenosis. In patients who could not be diagnosed by imaging examination, 34.4% (11/32) were diagnosed with urothelial carcinoma by RFU, and these results were also confirmed by postoperative pathology. In the present study, no patient had severe complications after RFU. The present results suggested RFU may be used as a sensitive method to diagnose UUT tumors (78.4%; 29/37) and has strong specificity. RFU could be performed as a routine examination for patients with hematuria from the UUT.

SC318 - Feasability of the epicheck test in upper urinary tract tumor

SC318 - Feasability of the epicheck test in upper urinary tract tumor

Genomic case report of a low grade bladder tumor metastasis to lung

BackgroundWe present a rare case where distant metastasis of a low grade bladder tumor was observed. We carried out detailed genomic analysis and cell based experiments on patient tumor samples to study tumor evolution, possible cause of disease and provide personalized treatment strategies.Case presentationA man with a smoking history was diagnosed with a low-grade urothelial carcinoma of the bladder and a concurrent high-grade upper urinary tract tumor. Seven years later he had a lung metastasis. We carried out exome sequencing on all the patient’s tumors and peripheral blood (germline) to identify somatic variants. We constructed a phylogenetic tree to capture how the tumors are related and to identify somatic changes important for metastasis. Although distant metastasis of low-grade bladder tumor is rare, the somatic variants in the tumors and the phylogenetic tree showed that the metastasized tumor had a mutational profile most similar to the low grade urothelial carcinoma. The primary and the metastatic tumors shared several important mutations, including in the KMT2D and the RXRA genes. The metastatic tumor also had an activating MTOR mutation, which may be important for tumor metastasis. We developed a mutational signature to understand the biologic processes responsible for tumor development. The mutational signature suggests that the tumor mutations are associated with tobacco carcinogen exposure, which is concordant with the patient’s smoking history. We cultured cells from the lung metastasis to examine proliferation and signaling mechanisms in response to treatment. The mTOR inhibitor Everolimus inhibited downstream mTOR signaling and induced cytotoxicity in the metastatic tumor cells.ConclusionWe used genomic analysis to examine a rare case of low grade bladder tumor metastasis to distant organ (lung). Our analysis also revealed exposure to carcinogens found is tobacco as a possible cause in tumor development. We further validated that the patient might benefit from mTOR inhibition as a potential salvage therapy in an adjuvant or recurrent disease setting.

Symptomatic urinary obstruction in patients with metastatic malignancies

Symptomatic urinary obstruction, characterised by decreased or absent urinary outflow, is a common concomitant disease in patients with urological malignancies or carcinomas forming abdominal metastases. While acute urinary obstruction is associated with renal colics, chronic urinary obstruction often goes unnoticed for a long time. In addition to intrinsic causes such as upper urinary tract tumours, this condition is often caused by external compression of the ureter by tumour masses. Placement of a ureteral JJ stent or a percutaneous nephrostomy tube results in early disobstruction. Depending on the prognosis of the underlying disease, a definitive surgical restoration may be considered.

MP59-09 UNPLANNED INTRAOPERATIVE CONVERSION TO OPEN DURING MINIMALLY INVASIVE KIDNEY SURGERY: THE IMPACT OF ROBOTICS

You have accessJournal of UrologyKidney Cancer: Localized: Surgical Therapy VI1 Apr 2018MP59-09 UNPLANNED INTRAOPERATIVE CONVERSION TO OPEN DURING MINIMALLY INVASIVE KIDNEY SURGERY: THE IMPACT OF ROBOTICS Abhinav Khanna, Daniel Sun, Alvin Wee, and Robert Abouassaly Abhinav KhannaAbhinav Khanna More articles by this author , Daniel SunDaniel Sun More articles by this author , Alvin WeeAlvin Wee More articles by this author , and Robert AbouassalyRobert Abouassaly More articles by this author View All Author Informationhttps://doi.org/10.1016/j.juro.2018.02.1861AboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookTwitterLinked InEmail INTRODUCTION AND OBJECTIVES Over the last two decades, there has been brisk adoption of minimally invasive surgical approaches (MIS) for major kidney surgery. Unplanned intraoperative conversion from MIS to open surgical approach adds patient morbidity, cost, and may mitigate the benefits of MIS. The frequency of intraoperative conversion for robotic and laparoscopic kidney surgery is unknown. We aim to compare rates of unplanned intraoperative conversion for robotic versus laparoscopic approaches among patients undergoing major kidney surgery. METHODS The National Cancer Database was used to identify patients with renal or upper urinary tract tumors who underwent robotic or laparoscopic partial nephrectomy, radical nephrectomy, or nephro-ureterectomy from 2010-2014. Baseline demographic and clinical characteristics, as well as intraoperative conversion rates to open surgery, were compared between robotic and laparoscopic approaches using chi-square. Multivariate logistic regression was used to identify predictors of intraoperative conversion. Between group differences in length of stay were analyzed using the Wilcoxon rank sum test. Propensity score 1:1 matching was performed to confirm study results. RESULTS A total of 61,191 patients underwent MIS partial nephrectomy (n=24,691), radical nephrectomy (n=33,644), or nephroureterectomy (n=2,856) during the study period. As shown in Figure 1, unplanned intraoperative conversion rates were lower for robotics than for laparoscopy across all surgery types (p<0.001). On multivariate logistic regression adjusting for clinical and sociodemographic variables, laparoscopic approach was associated with conversion from MIS to open compared to robotic approach. Median length of stay was significantly longer for patients who underwent intraoperative conversion than for those who did not (4.0 vs 3.0 days, p<0.0001). All analyses were repeated in propensity score matched cohorts, and results were confirmed. CONCLUSIONS Among patients undergoing minimally invasive major kidney surgery, robotic approach is associated with a lower rate of unplanned intraoperative conversion to open surgery than laparoscopic approach. This relative advantage should be considered when weighing the costs and benefits of robotic kidney surgery. © 2018FiguresReferencesRelatedDetails Volume 199Issue 4SApril 2018Page: e784-e785 Advertisement Copyright & Permissions© 2018MetricsAuthor Information Abhinav Khanna More articles by this author Daniel Sun More articles by this author Alvin Wee More articles by this author Robert Abouassaly More articles by this author Expand All Advertisement Advertisement PDF downloadLoading ...

1031 - Prognostic value of circulating miRNAs in upper urinary tract tumours

1031 - Prognostic value of circulating miRNAs in upper urinary tract tumours

Reduce bladder cancer recurrence in patients treated for upper urinary tract urothelial carcinoma: The REBACARE-trial.

BackgroundFollowing radical nephro-ureterectomy for urothelial carcinoma of the upper urinary tract (UUT), the reported bladder recurrence rate of urothelial carcinoma is 22–47%. A single intravesical instillation of chemotherapy within 10 days following nephro-ureterectomy has the potential to decrease the risk of a bladder recurrence significantly. Despite recommendation by the European Association of Urology guideline to administer a single instillation postoperatively, the compliance rate is low because the risk of extravasation of chemotherapy.AimTo reduce the risk of bladder cancer recurrence by a single intravesical instillation of Mitomycin immediately (within 3 h) before radical nephro-ureterectomy or partial ureterectomy.MethodsAdult patients (age ≥ 18 years) with a (suspicion of a) urothelial carcinoma of the UUT undergoing radical nephro-ureterectomy or partial ureterectomy will be eligible and will receive a single intravesical instillation of Mitomycin within 3 h before surgery. In total, 170 patients will be included in this prospective, observational study. Follow-up will be according to current guidelines.ResultsThe primary endpoint is the bladder cancer recurrence rate up to two years after surgery. Secondary endpoints are: a) the compliance rate; b) oncological outcome; c) possible side-effects; d) the quality of life; e) the calculation of costs of a single neoadjuvant instillation with Mitomycin and f) molecular characterization of UUT tumors and intravesical recurrences.ConclusionsA single intravesical instillation of Mitomycin before radical nephro-ureterectomy or partial ureterectomy may reduce the risk of a bladder recurrence in patients treated for UUT urothelial carcinoma and will circumvent the disadvantages of current therapy.

Asymptomatic microscopic hematuria as a predictor of neoplasia in the urinary tract

Objective: The Danish hematuria guidelines were revised in January 2016. Before revision, it was recommended that asymptomatic microscopic hematuria in patients more than 40 years old should be routinely urologically investigated. In the revised guidelines, patients with asymptomatic microscopic hematuria are not recommended to be investigated, irrespective of age. The purpose of this study was to investigate whether asymptomatic microscopic hematuria was predictive of neoplasia of the urinary tract in a referred cohort of patients.Methods: All patients older than 40 years referred from primary care to private clinics and public hospitals in the Central Denmark Region for evaluation of asymptomatic microscopic hematuria in a 2 year period from January 2014 to December 2015 were included retrospectively. All patients had been routinely investigated with computed tomography urography and outpatient flexible cystoscopy. Patients’ age and gender were recorded and the final diagnosis after full investigation was retrieved.Results: In total, 1305 patients (492 males and 813 females) were included. Eleven patients (0.8%) were diagnosed with neoplasia in the urinary tract, including non-invasive Ta bladder tumor (n = 6), benign tumors in the kidney (n = 2), invasive bladder cancer (n = 2) and carcinoma in situ in the urinary bladder (n = 1). None of the patients had renal cancer or upper urinary tract tumors as the final diagnosis.Conclusion: A minority of patients with malignancies or non-invasive tumors would have been missed based on the revised Danish hematuria referral pathways.

Upper Urinary Tract Tumors: Which Diagnostic Methods Are Needed?

Objectives: We reviewed the data of patients with upper urinary tract (UUT) tumors to evaluate the effectiveness of diagnostic procedures. Methods: This retrospective study evaluated tumor characteristics, imaging procedures, epidemiological and follow-up data of 113 patients. We analyzed the importance of non-invasive and endoscopic diagnosis in addition to imaging as well as the influence of stage and grade on recurrence rate. Results: Most tumors were urothelial carcinomas (92.9%). The cardinal symptoms were hematuria (40.7%), flank pain (2.7%), and urinary obstruction (14.2%). Forty-seven patients received intravenous urograms (IVUs), 57 retrograde ureteropyelography (RUP), 89 CTs, 6 an MRI. The correct positive tumor identification was reached by IVU in 27/47 patients, by RUP in 50/57, by CT in 74/89, and by MRI in 3/6 patients representing sensitivities of 57.4% (IVU), 87.7% (RUP), 83.1% (CT), and 50% (MRI). Sixty-four patients had urine cytology, which was correctly positive in 60.9% and 56 had a diagnostic ureterorenoscopy, which was correctly positive in 83.9%. During follow-up more than 20% of patients developed a recurrence. Conclusion: In patients with hematuria and flank pain, UUT must be considered a differential diagnosis. UUT to the extent of 76.6% showed more invasive growth (>Ta). Thus, rapid and efficient diagnosis based primarily on imaging is required. Contrast CT scan seems to be the imaging modality with the best performance. However, often only a combination of diagnostic procedures gives a certain diagnosis. Due to the high recurrence rate, close follow-up is needed.

2169 - Specialties in pathomorphology of moderately differentiated urothelial tumors of upper urinary tract

2169 - Specialties in pathomorphology of moderately differentiated urothelial tumors of upper urinary tract

Abordaje laparoscópico para el tratamiento quirúrgico de los tumores renales y del tracto urinario superior

IntroductionLaparoscopy is currently one of the options for the surgical treatment of kidney tumors and upper urinary tract tumors with oncologic results that are similar to those of open surgery. AimTo describe the experience in the laparoscopic treatment of kidney and upper urinary tract tumors at our hospital. Materials and methodsA retrospective and descriptive study was conducted, analyzing the database of patients with kidney or upper urinary tract tumors treated through the laparoscopic procedures of nephrectomy (radical or partial) or nephroureterectomy within the time frame of August 2006 and June 2015. Radiologic and histopathologic variables were analyzed, along with the frequency of complications (Clavien-Dindo classification). ResultsNinety-six patients were identified that underwent the laparoscopic approach. Fifty-eight radical nephrectomies, 24 partial nephrectomies, and 14 nephroureterectomies were performed. The conversion rate was 16.6% and the mean hospital stay was 5 days. Grade IIIa and IVa complications presented in 9.3% of the cases. The mean follow-up period was 31.2 months and only one patient has died, due to leukemia. ConclusionsWe consider the laparoscopic approach to be a good treatment option for kidney tumors and upper urinary tract tumors.