Understanding the Outcomes and Rationale for Treatment Decisions in Patients With Intermediate and High-risk Nonmuscle Invasive Bladder Cancer and Biomarkers for Response and Recurrence in Muscle Invasive Bladder Cancer: A Multi-center Prospective Observational Trial.
| Registry | NCT07893509, acronym BLAST |
|---|---|
| Status | Not yet recruiting |
| Study type | Observational |
| Enrollment | 1400 (Estimated) |
| Sponsor | Bladder Cancer Advocacy Network (Other) |
| Conditions | NMIBC, MIBC, Muscle Invasive Bladder Cancer (MIBC), Non Muscle Invasive Bladder Cancer |
| Interventions | This is a non-interventional, observational, prospective study. (Other) |
| Dates | start 2027-03-01 (estimated), primary completion 2032-05-01 (estimated), completion 2032-05-01 (estimated), first posted 2026-10-26, last updated 2026-10-26 |
| Locations | 1 site in United States |
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All trials for NMIBC All trials for MIBC All trials of This is a non-interventional, observational, prospective study.
This study aims to better understand how treatment choices impact outcomes for patients with intermediate- and high-risk non-muscle-invasive bladder cancer (NMIBC), as well as the factors that influence treatment decisions made by patients and their healthcare providers. The study will also include patients with muscle-invasive bladder cancer (MIBC). In addition to receiving standard care and routine follow up, these patients will provide blood samples over time. Researchers will analyze these samples for circulating tumor DNA (ctDNA), small fragments of DNA released into the bloodstream by cancer cells, to monitor how the cancer responds to treatment.
The information gained from this study may help improve treatment planning, disease monitoring, and overall outcomes for patients with bladder cancer.
This is a multi-center study whose aim is to understand outcomes based on treatment decisions for patients with intermediate and high risk NMIBC and to understand rationale for treatment decisions for patients and providers. The study will also enroll participants with MIBC who will receive longitudinal plasma ctDNA biomarker profiling in addition to their standard-of-care therapy and disease surveillance. The study will explore the use of non-invasive plasma ctDNA biomarkers to capture disease evolution and response to therapy for the potential development of an assay for early detection of recurrence and/or metastatic relapse in patients with MIBC.
| Arm | Type | Interventions | Description |
|---|---|---|---|
| Arm I: IR NMIBC | Other: This is a non-interventional, observational, prospective study. | Patients with Intermediate Risk non-muscle invasive bladder cancer | |
| Arm II: HR BCG naïve NMIBC | Other: This is a non-interventional, observational, prospective study. | Non-Muscle I invasive Bladder Cancer who have never received BCG, or patients who had a complete response to BCG and relapsed more than 24 months after their last BCG dose. | |
| Arm Ill: HR BCG exposed NMIBC | Other: This is a non-interventional, observational, prospective study. | Includes: * BCG-resistant NMIBC: Persistent or recurrent high-grade Ta or CIS disease at 3mo evaluation after at least 5/6 doses induction BCG. * Delayed relapse after inadequate BCG: Although maintenance BCG should always follow successful induction BCG according to the guidelines, many patients only receive induction without maintenance. Disease-free at the 3mo evaluation, so the earliest relapse would be 6mo after initial diagnosis. Latest relapse that would be considered would be a high-grade recurrence 24mo after initial diagnosis. * Delayed relapse after adequate BCG: Disease-free after induction and at least one course of maintenance BCG (or second round of induction BCG), but subsequently experience a high-grade recurrence outside of the BCG-unresponsive window (>6mo for Ta/T1 and >12mo for CIS). Since a high-grade relapse beyond 24mo after the last dose of BCG would probably respond well to BCG again, this disease state would include only patients with relapse up to 24mo. | |
| Arm IV: HR BCG unresponsive NMIBC | Other: This is a non-interventional, observational, prospective study. | Patients meeting the definition of BCG-unresponsive disease. Patients with HR NMIBC, "Adequate" induction + maintenance BCG (mBCG): at least 5/6 doses induction, plus at least 2/3 doses maintenance or at least 5/6 doses reinduction Categories of patients to include in BCG unresponsive arm: 1. \- patients with ≥ T1 HG disease on the first assessment following adequate induction BCG 2. \- patients with ≥ Ta HG disease within 6 months of adequate induction + maintenance BCG 3. \- patients with any component of CIS within 12 months of adequate induction + maintenance BCG 4. \- Any patient previously meeting criteria for BCG unresponsiveness who has a recurrence will be eligible for trial in category of BCG unresponsiveness even if last BCG was more than 1 year ago. | |
| Arm V: Muscle Invasive Bladder Cancer | Other: This is a non-interventional, observational, prospective study. | Muscle Invasive Cancer who receive ctDNA profiling over time in addition to receiving standard of care, which includes a radical cystectomy. This group includes those who choose adjuvant therapy and those who do not. |
Sex: All, ages: 18 Years to any
Inclusion Criteria: Arms I-IV * Meet criteria for intermediate risk or high risk (BCG naïve, BCG exposed or BCG unresponsive disease) * English speakers * 18 years of age or older * Ability to understand and the willingness to provide an informed consent * Pathology documentation from any hospital/clinic/medical center, and * Predominant urothelial carcinoma histology in the specimen * Patients undergoing any treatment including observation are eligible for inclusion * Patients enrolling on clinical trial are eligible for participation * Any patient previously meeting criteria for BCG unresponsiveness who has a recurrence will be eligible for trial in category of BCG unresponsiveness even if last BCG was more than 1 year ago Arm V: * Diagnosed with stage II-IIIB muscle-invasive bladder cancer without evidence of distant metastases * 18 years of age or older * Eastern Cooperative Oncology Group (ECOG) performance status 0-2 * Ability to understand and the willingness to provide an informed consent * Histologically confirmed urothelial carcinoma of the bladder * The patient is deemed a candidate for and plans to undergo radical cystectomy Exclusion Criteria: Arms I-IV * Any plasmacytoid or small cell (neuroendocrine) component in the pathology (past or current presentation) * Previous history of cystectomy or radiation therapy for bladder cancer * Previous history of muscle-invasive bladder cancer or metastatic bladder cancer * Untreated upper tract urothelial carcinoma * Incarcerated in a detention facility or in police custody (patients wearing a monitoring device can be enrolled) at baseline/screening * Unable to provide written informed consent * Unable to be contacted for research surveys * Unable to provide Pathology documentation from any hospital/clinic/medical center * Unable to answer patient questionnaires Arm V: * Evidence of metastatic disease at enrollment * Any small cell (neuroendocrine) component in the pathology (past or current presentation) * Prior history of radiation therapy for bladder cancer * Inability or unwillingness to undergo radical cystectomy (e.g., patient opts for primary trimodality therapy). * Prior systemic therapy for urothelial carcinoma, unless it is the NAT for the current MIBC diagnosis. * Untreated upper tract urothelial carcinoma. * Unable to provide written informed consent. * Not willing or able to adhere with the study procedures * Active secondary malignancy * Diagnosis of a malignancy within 3 years of bladder cancer diagnosis, with the exception of low-risk prostate cancer managed with active surveillance, small renal cell carcinoma managed with active surveillance, and skin cancer managed with active surveillance
| Facility | City | Country | Status |
|---|---|---|---|
| UT Southwestern Medical Center | Dallas, Texas | United States |