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Daneshmand, Siamak

0000-0001-6224-9598

Mayo Clinic

Department of Urology, Keck School of Medicine, University of Southern California, Los Angeles, CA.

Citations 8

Twelve-Month Results From the CISTO Study Comparing Radical Cystectomy Versus Bladder-Sparing Therapy for Recurrent High-Grade Non–Muscle-Invasive Bladder Cancer
Gore, John L. , Wolff, Erika M. , Nash, Michael G. , Comstock, Bryan A. , Gilbert, Scott M. , Chang, Sam S., Chisolm, Stephanie , MacLean, Douglas B., Wright, Jonathan L. , Kates, Max , Pohar, Kamal S. , Guzzo, Thomas J., Bivalacqua, Trinity J, Nepple, Kenneth G. , Montgomery, Jeffrey S., Scarpato, Kristen R., Master, Viraj A. , Chen, David YT , Mossanen, Matthew , O’Neil, Brock , Tyson, Mark D. , Mansour, Ahmed M. , Chamie, Karim, Riggs, Stephen B. , Kukreja, Janet Baack , Peyton, Cheri L. , Nix, Jeffrey W. , Dickstein, Rian, Sankin, Alex , Lane, Brian R. , Bassett, Jeffrey C. , Patel, Sanjay , Lee, Eugene K. , Ritch, Chad R. , Follmer, Kristin , Kim, Sung Min , Kessler, Larry G. , group, on behalf of the CISTO Collaborative, Gore, John L., Smith, Angela B., Wolff, Erika M., Comstock, Bryan A., Nash, Michael G., Follmer, Kristin M., Lee, Jenney R., Kim, Sung Min, Kessler, Larry G., Gilbert, Scott M., Chang, Sam S., Wright, Jonathan L., Kates, Max R., Pohar, Kamal S., Guzzo, Thomas J., Bivalacqua, Trinity J., Nepple, Kenneth G., Montgomery, Jeffrey S., Scarpato, Kristen R., Woldu, Solomon L., Master, Viraj A., Chen, David Y.T., Mossanen, Matthew, Daneshmand, Siamak, O'Neil, Brock B., Tyson, Mark D., Westerman, Mary E., Kamat, Ashish M., Mansour, Ahmed M., Chamie, Karim, Riggs, Stephen B., Kukreja, Janet B., Modi, Parth K., Garg, Tullika, Peyton, Charles C., Nix, Jeffrey W., Dickstein, Rian, Gadzinski, Adam J., Sankin, Alex, Shore, Neal D., Lane, Brian R., Bassett, Jeffrey C., Patel, Sanjay, Morris, David S., Macleod, Liam C., Lee, Eugene K., Ritch, Chad R., Chisolm, Stephanie, MacLean, Douglas B., Almeida, Fred, Murray, Mary Beth Ballard, Lindsey, Nancy, Lipman, Robert, Oliver, Richard M., Roscoe, Lori A., Sachse, Karen, Lotan, Yair, Porten, Sima P., Taylor, Jennifer M., Steinberg, Gary D., Catto, James W.F., Downs, Tracy M., Malin, Jennifer L., Davicioni, Elai, Rios, Patricia, Yano, Marielle, Jun, Grace, Li, Casey, Nefcy, Christopher, Basu, Anirban, Heagerty, Patrick J., Catto, James W.F. , Sankin, Alexander , Woldu, Solomon L , Master, Viraj A , Chen, David Y T , Daneshmand, Siamak , O'Neil, Brock B , Westerman, Mary E , Kamat, Ashish M. , Modi, Parth K , Peyton, Charles C , Gadzinski, Adam J , Shore, Neal , Patel, Sanjay , Ritch, Chad R , Follmer, Kristin M , Kim, Sung Min , Kessler, Larry G , Bivalacqua, Trinity J. , Daneshmand, Siamak , Westerman, Mary E. , Garg, Tullika K. , Shore, Neal D. , Morris, David S. , Macleod, Liam Connor , Lee, Jenney R. , Smith, Angela B. , group, on behalf of the CISTO Collaborative, Gore, John L., Smith, Angela B., Wolff, Erika M., Comstock, Bryan A., Nash, Michael G., Follmer, Kristin M., Lee, Jenney R., Kim, Sung Min, Kessler, Larry G., Gilbert, Scott M., Chang, Sam S., Wright, Jonathan L., Kates, Max R., Pohar, Kamal S., Guzzo, Thomas J., Bivalacqua, Trinity J., Nepple, Kenneth G., Montgomery, Jeffrey S., Scarpato, Kristen R., Woldu, Solomon L., Master, Viraj A., Chen, David Y.T., Mossanen, Matthew, Daneshmand, Siamak, O'Neil, Brock B., Tyson, Mark D., Westerman, Mary E., Kamat, Ashish M., Mansour, Ahmed M., Chamie, Karim, Riggs, Stephen B., Kukreja, Janet B., Modi, Parth K., Garg, Tullika, Peyton, Charles C., Nix, Jeffrey W., Dickstein, Rian, Gadzinski, Adam J., Sankin, Alex, Shore, Neal D., Lane, Brian R., Bassett, Jeffrey C., Patel, Sanjay, Morris, David S., Macleod, Liam C., Lee, Eugene K., Ritch, Chad R., Chisolm, Stephanie, MacLean, Douglas B., Almeida, Fred, Murray, Mary Beth Ballard, Lindsey, Nancy, Lipman, Robert, Oliver, Richard M., Roscoe, Lori A., Sachse, Karen, Lotan, Yair, Porten, Sima P., Taylor, Jennifer M., Steinberg, Gary D., Catto, James W.F., Downs, Tracy M., Malin, Jennifer L., Davicioni, Elai, Rios, Patricia, Yano, Marielle, Jun, Grace, Li, Casey, Nefcy, Christopher, Basu, Anirban, Heagerty, Patrick J.

Journal of Clinical Oncology | December 15, 2025 | Volume: 44 | Issue: 4 | Pages: 274-285

10.1200/jco-25-01324 Get It

PURPOSE To compare patient-reported and clinical outcomes between radical cystectomy (RC) and bladder-sparing therapy (BST) in patients with recurrent high-grade non–muscle-invasive bladder cancer (NMIBC). PATIENTS AND METHODS This pragmatic, prospective observational cohort study was designed with patients, who selected and prioritized outcomes. Eligible adults were candidates for both RC or BST, had previous induction Bacillus Calmette-Guérin (BCG), and received their last treatment within 12 months. The primary outcome was the EORTC-QLQ-C30 physical function scale at 12 months. Secondary outcomes included other EORTC-QLQ-C30 scales, depression, anxiety, bladder cancer–specific quality of life (QOL), financial burden, and cancer-specific outcomes. Targeted maximum likelihood estimation (TMLE) was used to calculate average treatment effect (ATE) estimates between arms. Inverse probability weighted risk ratios (wRR) were calculated using quasi-Poisson regression. RESULTS Of 570 participants (mean age 71.4 years; 21% female), 371 selected BST and 199 selected RC. Physical function was significantly worse in the RC arm at 3 months; by 9 months, there was no difference between arms, and at 12 months, physical function did not differ (ATE, 0.9; 95% CI, –0.6 to 2.4; P = .22). RC was associated with better emotional function, generic health-related QOL, and financial burden, and lower depression and anxiety, while BST was associated with better bowel and sexual health. Cancer-specific survival was 99% for BST versus 96% for RC (wRR, 0.99; 95% CI, 0.97 to 1.01). RC was associated with a higher risk of adverse events and serious adverse events, including a 90-day mortality rate of 2.5%. CONCLUSION Most patient-prioritized outcomes were similar or better among participants who chose RC compared with BST. These findings support the continued role of RC in managing recurrent high-grade NMIBC.
Primary retroperitoneal lymph node dissection in clinical stage 2a/b non‐seminomatous germ cell tumour
Antonelli, Luca , Heidenreich, Axel , Baky, Fady , Branger, Nicolas , Daneshmand, Siamak , Djaladat, Hooman , Eggener, Scott E. , Sexton, Wade J. , Nicol, David , Olson, Kathleen, Paffenholz, Pia , Porter, James , Qian, Zhiyu , Rocco, Nicholas R., Stroup, Sean P. , Tachibana, Isamu , Cary, Clint , Daneshmand, Siamak , Djaladat, Hooman , Ghoreifi, Alireza , Nicol, David , Nicolai, Nicola , Paffenholz, Pia , Porter, James , Stroup, Sean P , Fankhauser, Christian Daniel , Bagrodia, Aditya , Amini, Armon , Cazzaniga, Walter , Clinton, Timothy Nguyen , Ghoreifi, Alireza , Hamilton, Robert J , Ho, Matthew, Nazzani, Sebastiano , Olson, Kathleen, Yerrapragada, Anirudh , Terbuch, Angelika , Singla, Nirmish

BJU International | December 11, 2024 | Volume: 135 | Issue: 4 | Pages: 621-628

10.1111/bju.16618 Get It

Objectives To reassess the role of primary retroperitoneal lymph node dissection (RPLND) in patients with marker‐negative non‐seminomatous germ cell tumour (NSGCT) clinical stage (CS) 2a, to explore results in patients with CS 2b and to evaluate surgical methods, recurrence, and adjuvant chemotherapy indications. Materials and Methods Data from 17 institutions were collected, comprising 305 men who underwent primary RPLND for CS 2 NSGCT. Regression analyses were conducted to predict histology in the RPLND specimen and disease‐free survival (DFS). Results A larger retroperitoneal lymph node diameter was associated with pure teratoma in the RPLND specimen (odds ratio [OR] 1.02, 95% confidence interval [CI] 1.01–1.07; P = 0.03), but no association was observed with DFS. The 5‐year DFS rates in marker negative CS 2a and 2b were 79% and 76%. In men with non‐teratomatous viable cancer in the RPLND specimen, the 5‐year DFS rates for CS 2a and 2b were 95% and 87% with adjuvant chemotherapy, and 67% and 74% without adjuvant chemotherapy. We did not identify an association between the number of adjuvant chemotherapy cycles and DFS. Conclusions Our study suggests considering primary RPLND not only in marker‐negative CS 2a but also in CS 2b. Further research should determine the efficacy of primary RPLND in men with CS 2c and marker‐positive CS 2, as well as which patients may benefit from adjuvant chemotherapy and the optimal cycle number.
Clinical Significance of Tumor Location for Ureteroscopic Tumor Grading in Upper Tract Urothelial Carcinoma
Katayama, Satoshi , Pradère, Benjamin , Grossmann, Nico C. , Potretzke, Aaron M. , Boorjian, S., Daneshmand, Siamak , Djaladat, Hooman , Sfakianos, John P. , D’Andrea, David , Hayakawa, Nozomi , Heindenreich, Axel, Margulis, Vitaly , Karakiewicz, Pierre I, Nasu, Yasutomo , Shariat, Shahrokh F., Grossman, Nico C , Daneshmand, Siamak , D'Andrea, David , Ghoreifi, Alireza , Pradere, Benjamin , Ghoreifi, Alireza , Mari, Andrea , Khene, Z. , Fujita, Kazutoshi , Heindenreich, Axel, Raman, Jay D. , Roumiguié, M. , Abdollah, Firas , Breda, Alberto , Fontana, Matteo , Rouprêt, Morgan , Karakiewicz, Pierre I., Araki, Motoo , Shariat, Shahrokh F.

Journal of Endourology | September 12, 2024 | Volume: 38 | Issue: 11 | Pages: 1156-1163

10.1089/end.2024.0335 Get It

Background: Although previous literature shows tumor location as a prognostic factor in upper tract urothelial carcinoma (UTUC), there remains uninvestigated regarding the impact of tumor location on grade concordance and discrepancies between ureteroscopic (URS) biopsy and final radical nephroureterectomy (RNU) pathology. Methods: In this international study, we retrospectively reviewed the records of 1,498 patients with UTUC who underwent diagnostic URS with concomitant biopsy followed by RNU between 2005 and 2020. Tumor location was divided into four sections: the calyceal-pelvic system, proximal ureter, middle ureter, and distal ureter. Patients with multifocal tumors were excluded from the study. We performed multiple comparison tests and logistic regression analyses. Results: Overall, 1,154 patients were included; 54.4% of those with low-grade URS biopsies were upgraded on RNU. In the multiple comparison tests, middle ureter tumors exhibited the highest probability of upgrading, meanwhile pelvicalyceal tumors exhibited the lowest probability of upgrading (73.7% vs 48.5%, p = 0.007). Downgrading was comparable across all tumor locations. On multivariate analyses, middle ureteral location was significantly associated with a low probability of grade concordance (odds ratio [OR] 0.59; 95% confidence interval [CI], 0.35–1.00; p = 0.049) and an increased risk of upgrading (OR 2.80; 95% CI, 1.20–6.52; p = 0.017). The discordance did not vary regardless of caliceal location, including the lower calyx. Conclusions: Middle ureteral tumors diagnosed to be low grade had a high probability to be undergraded. Our data can inform providers and their patients regarding the likelihood of undergrading according to tumor location, facilitating patient counseling and shared decision making regarding the choice of kidney sparing vs RNU.
Comparative cost-effectiveness of contemporary treatment strategies for stage IIA seminoma
Sharma, Vidit , Wymer, Kevin , Walia, Arman, Costello, Brian A. , Pagliaro, Lance C. , Daneshmand, Siamak , Leibovich, Bradley C. , Boorjian, Stephen A. , Joyce, Daniel D , Moriarty, James P. , Pagliaro, Lance C , Daneshmand, Siamak , Boorjian, Stephen A , Joyce, Daniel , Borah, Bijan J.

JNCI: Journal of the National Cancer Institute | October 11, 2023 | Volume: 116 | Issue: 3 | Pages: 468-475

10.1093/jnci/djad211 Get It

Abstract Background The Surgery in Early Metastatic Seminoma (SEMS) trial examined retroperitoneal lymph node dissection as first-line treatment for patients with isolated 1-3 cm retroperitoneal lymphadenopathy. To date, the standard of care for these patients has been either chemotherapy or radiotherapy. Herein, we evaluated the relative cost-effectiveness of these management strategies. Methods A microsimulation model assessed the cost-effectiveness of retroperitoneal lymph node dissection, chemotherapy, and radiotherapy for stage IIA seminoma. Sensitivity analyses were performed to evaluate model robustness. Retroperitoneal lymph node dissection recurrence probabilities were obtained from the SEMS trial. All other probability and utility values were obtained from published literature. Primary outcomes included costs from a commercial insurer’s perspective, effectiveness (quality adjusted life-years [QALYs]), and incremental cost-effectiveness ratios using a willingness-to-pay threshold of $100 000/QALY. Results At a lifetime horizon, the mean costs per patient for retroperitoneal lymph node dissection, radiotherapy, and chemotherapy were $58 469, $98 783, and $104 096, and the mean QALYs were 40.61, 40.70, and 39.15, respectively. Retroperitoneal lymph node dissection was found to be the most cost-effective approach because of high costs and accrued disutility of chronic toxicities associated with radiotherapy (cost-effectiveness ratios = $433 845/QALY) and chemotherapy (dominated). On 1-way sensitivity analyses, retroperitoneal lymph node dissection was no longer cost-effective if the probabilities of infertility and cardiovascular toxicity after radiotherapy were less than 13% and 16%, respectively, or if the 2-year probability of progression after retroperitoneal lymph node dissection was more than 26%. Conclusions Retroperitoneal lymph node dissection was the most cost-effective treatment approach for stage IIA seminoma. These findings support clinical guideline consideration of including retroperitoneal lymph node dissection as a treatment option for well-selected patients with stage IIA seminoma.
Risk Factors for Relapse in Nonseminomatous Testicular Cancer After Postchemotherapy Retroperitoneal Lymph Node Dissection With Viable Residual Cancer
Antonelli, Luca , Ardizzone, Davide, Tachibana, Isamu , Adra, Nabil , Cary, Clint , Sexton, Wade J. , Daneshmand, Siamak , Franza, Andrea , Heidenreich, Axel , Paffenholz, Pia , Saoud, Ragheed , Eggener, Scott E. , Oswald, Nathaniel W., Olson, Kathleen, Tryakin, A. , Javaud, Christophe, Cazzaniga, Walter , Nicol, David , Gerdtsson, Axel , Tandstad, Torgrim , Fizazi, Karim , Sexton, Wade J , Bagrodia, Aditya , Daneshmand, Siamak , Nazzani, Sebastiano , Franza, Andrea , Heidenreich, Axel , Saoud, Ragheed , Eggener, Scott , Oswald, Nathaniel, Tryakin, Alexey , Fedyanin, Mikhail , Cazzaniga, Walter , Gerdtsson, Axel , Fizazi, Karim , Fankhauser, Christian Daniel , Hugar, Lee A. , Mego, Michal , Nicolai, Nicola , Giannatempo, Patrizia , Ho, Matthew, Olson, Kathleen, Naoun, Natacha

Journal of Clinical Oncology | September 1, 2023 | Volume: 41 | Issue: 34 | Pages: 5296-5305

10.1200/jco.23.00443 Get It

What is the role of pcRPLND in men with retroperitoneal vital cancer after first-line chemotherapy? This question arises because of the potential predictive value of miR371 in identifying residual cancer even before pcRPLND! @cdfankhauser shared data within a multicenter cohort study redefining future practice in the miR371 era.
Surgery in Early Metastatic Seminoma: A Phase II Trial of Retroperitoneal Lymph Node Dissection for Testicular Seminoma With Limited Retroperitoneal Lymphadenopathy
Daneshmand, Siamak , Cary, Clint , Masterson, Timothy A. , Einhorn, Lawrence H. , Adra, Nabil , Boorjian, Stephen A. , Kollmannsberger, Christian , Schuckman, Anne, So, Alan , Black, Peter C. , Skinner, Eila C., Alemozaffar, Mehrdad, Brand, Timothy C., Eggener, Scott E. , Nappi, Lucia , Nichols, Craig R. , Luo, Chunqiao, Hu, Brian , Black, Peter , Bagrodia, Aditya , Eggener, Scott , Pierorazio, Phillip , Stratton, Kelly , Nappi, Lucia , Nichols, Craig , Daneshmand, Siamak , Li, Ming

Journal of Clinical Oncology | March 13, 2023 | Volume: 41 | Issue: 16 | Pages: 3009-3018

10.1200/jco.22.00624 Get It

PURPOSE The long-term toxicities of chemotherapy and radiotherapy can represent a significant burden to testicular cancer survivors. Retroperitoneal lymph node dissection (RPLND) is an established treatment for testicular germ cell tumors with minimal late morbidity although little data exist on its efficacy in early metastatic seminoma. Surgery in early metastatic seminoma is a prospective phase II single-arm, multi-institutional trial of RPLND as first-line treatment for testicular seminoma with clinically low-volume retroperitoneal lymphadenopathy. PATIENTS AND METHODS Twelve sites in the United States and Canada prospectively enrolled adult patients with testicular seminoma and isolated retroperitoneal lymphadenopathy (1-3 cm). Open RPLND was performed by certified surgeons with a primary end point of 2-year recurrence-free survival (RFS). Complication rates, pathologic up/downstaging, recurrence patterns, adjuvant therapies, and treatment-free survival were assessed. RESULTS A total of 55 patients were enrolled, with a median (IQR) largest clinical lymph node size of 1.6 cm (1.3-1.9). RPLND pathology demonstrated a median (IQR) largest lymph node size of 2.3 cm (0.9-3.5); nine patients (16%) were pN0, 12 (22%) pN1, 31 (56%) pN2, and 3 (5%) pN3. One patient received adjuvant chemotherapy. With a median (IQR) follow-up of 33 months (12.0-61.6), 12 patients experienced recurrence, with a 2-year RFS of 81% and a recurrence rate of 22%. Of the patients who experienced recurrence, 10 were treated with chemotherapy and two underwent additional surgery. At last follow-up, all patients who experienced a recurrence were disease-free and the 2-year overall survival was 100%. Four patients (7%) experienced short-term complications, and four patients experienced long-term complications including incisional hernia (1) and anejaculation (3). CONCLUSION RPLND is a treatment option for testicular seminoma with clinically low-volume retroperitoneal lymphadenopathy and is associated with low long-term morbidity.
Pentafecta for Radical Nephroureterectomy in Patients with High-Risk Upper Tract Urothelial Carcinoma: A Proposal for Standardization of Quality Care Metrics
König, Frederik , Grossmann, Nico C. , D’Andrea, David , Juvet, Tristan , Potretzke, Aaron M. , Djaladat, Hooman , Ghoreifi, Alireza , Kikuchi, Eiji , Hayakawa, Nozomi , Mari, Andrea , Khene, Z. , Fujita, Kazutoshi , Fontana, Matteo , Sfakianos, John P. , Pfail, John , Laukhtina, Ekaterina , Rajwa, Paweł , Pallauf, Maximilian , Cacciamani, Giovanni , Doeveren, Thomas van , Boormans, Joost L., Antonelli, Alessandro , Jamil, Marcus , Budzyn, Jeffrey, Ploussard, Guillaume , Heidenreich, Axel , Daneshmand, Siamak , Boorjian, Stephen A. , Rink, Michael , Shariat, Shahrokh F. , Pradère, Benjamin , D'Andrea, David , Juvet, Tristan , Potretzke, Aaron, Ghoreifi, Alireza , Kikuchi, Eiji , Mari, Andrea , Khene, Zine-Eddine , Fujita, Kazutoshi , Fontana, Matteo , Laukhtina, Ekaterina , Pallauf, Maximilian , Cacciamani, Giovanni E , van Doeveren, Thomas , Boormans, Joost L , Antonelli, Alessandro , Ploussard, Guillaume , Daneshmand, Siamak , Shariat, Shahrokh F , Pradere, Benjamin , Grossman, Nico C , Rajwa, Pawel , Soria, Francesco , Raman, Jay D. , Breda, Alberto , Abdollah, Firas , Rouprêt, Morgan

Cancers | March 31, 2022 | Volume: 14 | Issue: 7 | Pages: 1781

10.3390/cancers14071781 Get It

Background: Measuring quality of care indicators is important for clinicians and decision making in health care to improve patient outcomes. Objective: The primary objective was to identify quality of care indicators for patients with upper tract urothelial carcinoma (UTUC) and to validate these in an international cohort treated with radical nephroureterectomy (RNU). The secondary objective was to assess the factors associated with failure to validate the pentafecta. Design: We performed a retrospective multicenter study of patients treated with RNU for EAU high-risk (HR) UTUC. Outcome measurements and statistical analysis: Five quality indicators were consensually approved, including a negative surgical margin, a complete bladder-cuff resection, the absence of hematological complications, the absence of major complications, and the absence of a 12-month postoperative recurrence. After multiple imputations and propensity-score matching, log-rank tests and a Cox regression were used to assess the survival outcomes. Logistic regression analyses assessed predictors for pentafecta failure. Results: Among the 1718 included patients, 844 (49%) achieved the pentafecta. The median follow-up was 31 months. Patients who achieved the pentafecta had superior 5-year overall- (OS) and cancer-specific survival (CSS) compared to those who did not (68.7 vs. 50.1% and 79.8 vs. 62.7%, respectively, all p < 0.001). On multivariable analyses, achieving the pentafecta was associated with improved recurrence-free survival (RFS), CSS, and OS. No preoperative clinical factors predicted a failure to validate the pentafecta. Conclusions: Establishing quality indicators for UTUC may help define prognosis and improve patient care. We propose a pentafecta quality criteria in RNU patients. Approximately half of the patients evaluated herein reached this endpoint, which in turn was independently associated with survival outcomes. Extended validation is needed.
Role of blue‐light cystoscopy in detecting invasive bladder tumours: data from a multi‐institutional registry
Ahmadi, Hamed , Ladi‐Seyedian, Seyedeh‐Sanam , Konety, Badrinath R. , Pohar, Kamal S. , Holzbeierlein, Jeffrey M., Kates, Max , Willard, Brian, Taylor, Jennifer M. , Kaimakliotis, Hristos Z. , Porten, Sima P. , Tyson, Mark D. , Group, the Blue Light Cystoscopy with Cysview Registry, Lotan, Yair , Daneshmand, Siamak , Liao, Joseph C. , Steinberg, Gary D. , Lotan, Yair , Daneshmand, Siamak , Group, the Blue Light Cystoscopy with Cysview Registry

BJU International | October 13, 2021 | Volume: 130 | Issue: 1 | Pages: 62-67

10.1111/bju.15614 Get It

Objectives To evaluate the role of blue‐light cystoscopy (BLC) in detecting invasive tumours that were not visible on white‐light cystoscopy (WLC). Patients and Methods Using the multi‐institutional Cysview registry database, patients who had at least one white‐light negative (WL–)/blue‐light positive (BL+) lesion with invasive pathology (≥T1) as highest stage tumour were identified. All WL–/BL+ lesions and all invasive tumours in the database were used as denominators. Relevant baseline and outcome data were collected. Results Of the 3514 lesions (1257 unique patients), 818 (23.2%) lesions were WL−/BL+, of those, 55 (7%) lesions were invasive (48 T1, seven T2; 47 unique patients) including 28/55 (51%) de novo invasive lesions (26 unique patients). In all, 21/47 (45%) patients had WL−/BL+ concommitant carcinoma in situ and/or another T1 lesions. Of 22 patients with a WL−/BL+ lesion who underwent radical cystectomy (RC), high‐risk pathological features leading to RC was only visible on BLC in 18 (82%) patients. At time of RC, 11/22 (50%) patients had pathological upstaging including four (18%) with node‐positive disease. Conclusions A considerable proportion of invasive lesions are only detectable by BLC and the rate of pathological upstaging is significant. Our present findings suggest an additional benefit of BLC in the detection of invasive bladder tumours that has implications for treatment approach.