- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT05969964
Can Second Resection for pT1 Bladder Cancer be Avoided After Initial En-Bloc Resection With Negative Safety Margins
Can Second Resection for pT1 Bladder Carcinoma be Safely Avoided After Initial En-Bloc Resection With Negative Vertical and Horizontal Safety Margins: A Randomized Controlled Trial
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Bladder cancer (BC) is the one of the most prevalent cancer in Egypt representing nearly 30% of all cancers. Approximately 75% of newly diagnosed BC present with non-muscle invasive disease (NMIBC). Initial treatment for most BCs includes transurethral resection (TUR) of the tumor to obtain tissues sufficient for histo-pathological examination to determine if the tumor reaches the muscular proprietary or not.
In the setting of non muscle invasive urothelial carcinoma (NMIBC) especially T1HG, several studies showed a benefit of performing repeat resection within 2- 6 weeks to ensure adequate resection and exclude invasion of muscle layer.
However, several issues make this recommendation ie. Re-TUR at least debatable . First, most of these recommendations are based on heterogenous studies that didn't report cancer specific survival (CSS). The risk of upstaging to muscle-invasive disease at re-TUR i did not exceed 7% in recent series . Moreover, the potential complications of re TUR that include bladder perforation and extravasation may delay administration of intravesical BCG and this delay is associated with increased risk of tumor recurrence and progression.
On the other hand, several studies have demonstrated that presence of detrusor muscle (DM) in the initial specimen is a surrogate marker of resection quality and was associated with less incidence of residual tumor at the re TUR. New techniques like En-bloc resection of bladder tumour (ERBT) entails a circumferential incision around the tumor with 5-10 mm safety margin, then proceed to deep muscle layer underneath the tumor where it is dissected using a combination of blunt dissection and laser or diathermy energy. This technique allows accurate assessment of the depth of invasion and the infiltration pattern of NMIBC and thus improving the accuracy of pathological diagnosis.
Recently published articles on this topic reported a higher rate of detrusor muscle in the specimen (96%) with enbloc compared to conventional TURB.
In a retrospective analysis of 106 patients with pT1 bladder cancer treated with ERBT, 50 patients underwent re-TUR and no significant benefits in terms of RFS and PFS to performing a reTUR in all patients with pT1 on initial ERBT.
Residual tumors were found in 6 patients (12%) and none of them were upstaged to T2 disease. Interestingly, no residual disease or recurrence overtime at the initial ERBT site in patients with negative horizontal safety margins and residual tumor was found in 2 out of 45 patients with negative vertical safety margins
Aim of Work
The aim of this study is to assess the impact of avoiding re TUR after initial enbloc resection of primary tumor with negative safety margins on recurrence free survival (RFS) ,progression free survival (PFR) and cancer specific survival (CSS ) in patients with pT1 bladder cancer through a RCT.
Study Type
Enrollment (Estimated)
Contacts and Locations
Study Contact
- Name: Mahmoud Laymon, MD,MRCS
- Phone Number: 01002275698
- Email: dr_mahmoudlaymon@mans.edu.eg
Study Contact Backup
- Name: Ahmed elassmy, MD
- Email: a_assmy@yahoo.com
Study Locations
-
-
Dakahlia
-
Mansoura, Dakahlia, Egypt, 35516
- Recruiting
- Urology and nephrology center, Mansoura University
-
Contact:
- Ahmed Mosbah, MD
- Phone Number: 01002275698
- Email: mosbah64@yahoo.com
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
- Adult
- Older Adult
Accepts Healthy Volunteers
Sampling Method
Study Population
Description
Inclusion Criteria:
• Patients treated with ERBT and diagnosed with pT1 disease with negative vertical and horizontal safety margins at final pathology.
Exclusion Criteria:
- Large tumors not suitable for ERBT
- Residual tumor.
- Multicentric tumors ( more than 4 lesions)
- Presence of CIS.
- Positive vertical or horizontal safety margins after initial resection.
Study Plan
How is the study designed?
Design Details
Cohorts and Interventions
Group / Cohort |
Intervention / Treatment |
---|---|
Re_TUR
Those patients diagnosed with pT1 after initial ERBT with negative vertical and horizontal safety margins will undergo second look as endorsed by the guidelines.
|
Those patients diagnosed with pT1 after initial ERBT with negative vertical and horizontal safety margins won't undergo second look as endorsed by the guidelines.
|
No re_TUR
Those patients diagnosed with pT1 after initial ERBT with negative vertical and horizontal safety margins won't undergo second look as endorsed by the guidelines and will receive directly intravesical BCG
|
Those patients diagnosed with pT1 after initial ERBT with negative vertical and horizontal safety margins won't undergo second look as endorsed by the guidelines.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Impact of avoiding repeat resection on recurrence and progression free survival.
Time Frame: 12 month
|
occurrence of new tumors or progression of the primary tumor will be compared between both groups.
Tis will be assessed by both cystoscopy and MRI findings
|
12 month
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
perioperative complications associated with re TURBT
Time Frame: 12 month
|
The incidence of perioperative complications after repeat resection will be documented and compared between both groups.
This outcome will be assessed using Dindo-Clavien classification.
|
12 month
|
Other Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
The financial cost associated with performing repeat resection.
Time Frame: 12 months
|
Financial cost of repeat resection will be assessed in USD and compared between both groups.
|
12 months
|
Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Mahmoud Laymon, MD,MRCS, Urology &Nephrology Center, Mansoura University, Egypt
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Estimated)
Study Completion (Estimated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- MS.23.06.2435
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
Clinical Trials on Bladder Cancer Stage I
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National Cancer Institute (NCI)CompletedStage III Bladder Cancer | Stage I Bladder Cancer | Stage II Bladder CancerUnited States
-
Roswell Park Cancer InstituteNational Cancer Institute (NCI)RecruitingStage 0a Bladder Cancer AJCC v8 | Stage 0is Bladder Cancer AJCC v8 | Stage I Bladder Cancer AJCC v8United States
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Ankara Training and Research HospitalCompletedBladder Cancer Stage 0 | Bladder Cancer Stage ITurkey
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University of Southern CaliforniaNational Cancer Institute (NCI); National Institute for Biomedical Imaging...TerminatedStage II Bladder Urothelial Carcinoma | Stage IV Bladder Urothelial Carcinoma | Stage III Bladder Urothelial Carcinoma | Bladder Papillary Urothelial Carcinoma | Stage 0a Bladder Urothelial Carcinoma | Stage 0is Bladder Urothelial Carcinoma | Stage I Bladder Cancer With Carcinoma In Situ | Stage...United States
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M.D. Anderson Cancer CenterNational Cancer Institute (NCI)CompletedStage III Bladder Cancer AJCC v8 | Stage I Bladder Cancer AJCC v8 | Stage IIIA Bladder Cancer AJCC v8 | Stage IIIB Bladder Cancer AJCC v8 | Stage II Bladder Cancer AJCC v8United States
-
National Cancer Institute (NCI)TerminatedStage III Bladder Cancer | Stage IV Bladder Cancer | Recurrent Bladder Carcinoma | Bladder Adenocarcinoma | Bladder Squamous Cell Carcinoma | Bladder Urothelial Carcinoma | Stage I Bladder Cancer | Stage II Bladder CancerUnited States
-
National Cancer Institute (NCI)CompletedRecurrent Bladder Carcinoma | Stage I Bladder Cancer AJCC v6 and v7 | Stage II Bladder Cancer AJCC v6 and v7 | Stage III Bladder Cancer AJCC v6 and v7United States
-
University of Southern CaliforniaNational Cancer Institute (NCI)TerminatedStage III Renal Cell Cancer | Recurrent Bladder Carcinoma | Stage I Prostate Cancer | Stage III Prostate Cancer | Infiltrating Bladder Urothelial Carcinoma | Stage II Bladder Urothelial Carcinoma | Stage IIA Prostate Cancer | Stage IIB Prostate Cancer | Stage I Renal Cell Cancer | Stage II Renal Cell CancerUnited States
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National Cancer Institute (NCI)Radiation Therapy Oncology GroupCompletedBladder Urothelial Carcinoma | Stage I Bladder Cancer AJCC v6 and v7 | Stage II Bladder Cancer AJCC v6 and v7 | Stage III Bladder Cancer AJCC v6 and v7United States, Canada
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