The Guiding Value of Liquid Biopsy Based on Urinary Tumor DNA/RNA in the Second Transurethral Resection of High-risk Non-muscle Invasive Bladder Cancer
For patients and families
In plain language
An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.
- What is being studied
- The protocol lists: urine tumor DNA/RNA testing.
- Who it may be relevant to
- Registry conditions: Bladder Cancer, Liquid Biopsy. Basic parameters: from 18 years · All.
- What needs checking
- Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
- Where it takes place
- China
- Next step
- Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →
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Official title
Truce-LB00:The Guiding Value of Liquid Biopsy Based on Urinary Tumor DNA/RNA in the Second Transurethral Resection of High-risk Non-muscle Invasive Bladder Cancer: An Open-Label, Observational, Single-Center Clinical Study
Overview
High-risk non-muscle-invasive bladder cancer (NMIBC) carries a substantial risk of residual disease after initial transurethral resection of bladder tumor (TURBT). Current guidelines recommend a second TURBT (re-TURBT) within 2-6 weeks for patients with stage T1 disease to remove residual tumor, confirm staging, and obtain additional pathological information. However, the actual survival benefit of routine re-TURBT for all high-risk patients remains debated, and the procedure may pose surgical risks, increase healthcare costs, and impact patient quality of life. Urine tumor DNA (utDNA) and urine tumor RNA (utRNA) are molecular biomarkers detectable through non-invasive "liquid biopsy" methods. In urothelial carcinoma, tumor-derived nucleic acids can be shed into urine, where they can be detected with high sensitivity and specificity. These biomarkers may help identify patients most likely to harbor residual disease after initial TURBT, and thus most likely to benefit from re-TURBT. This prospective, open-label, observational, single-center study aims to evaluate the clinical value of utDNA/utRNA testing in guiding re-TURBT for patients with high-risk NMIBC. The study will assess whether molecular urine testing can improve patient selection for re-TURBT, potentially reducing unnecessary procedures while maintaining oncological safety.
Interventions
- Diagnostic test urine tumor DNA/RNA testing
The test analyzes DNA and RNA fragments shed by urothelial carcinoma cells into urine, detecting tumor-specific genetic and epigenetic alterations.
Primary outcome measures
- Concordance analysis of urine tumor DNA/RNA testing results with results of secondary TURBT histopathology [Time frame: Through study completion, an average of 6 months]
Eligibility criteria
Inclusion criteria
Participants must meet all of the following criteria to be eligible for the study:
- Male or female, aged 18 years or older.
- Histologically confirmed non-muscle-invasive bladder tumor, with no evidence of muscle-invasive bladder cancer or metastatic disease.
- Histologically confirmed urothelial carcinoma of the bladder or bladder tumor with urothelial carcinoma as the predominant component (>50%).
- At least one of the following conditions:
- Incomplete initial transurethral resection of bladder tumor (TURBT) or suspected incomplete resection.
- Absence of detrusor muscle in the initial TURBT pathological specimen (except for low-grade Ta stage tumors or carcinoma in situ \[CIS\]).
- T1 stage tumor.
- Willingness to provide a 50 mL urine sample between 2-6 weeks after the initial TURBT and prior to re-TURBT.
- Willingness to provide tumor tissue samples for pathological examination.
- Willingness to undergo genetic testing required for the trial.
- Voluntarily agrees to participate in the study, has signed informed consent, demonstrates good compliance, and is willing to complete study follow-up.
Exclusion criteria
- Contraindications to transurethral resection of bladder tumor (TURBT).
- Concurrent malignancy of the upper urinary tract (ureter or renal pelvis).
Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.
Healthy volunteers: No
Study design
- Observational model
- Cohort
Study locations
China · 2 centers
- General Hospital of Tianjin Medical University — Tianjin
- The second hospital of Tianjin Medical University — Tianjin
Identifiers
NCT: NCT07130578 · Truce-LB00