Try the modernized beta website. Learn more about the modernization effort.
Working… Menu
Trial record 1 of 2 for:    seals | Bladder Cancer
Previous Study | Return to List | Next Study

Surveillance of High-grade Non-muscle Invasive Bladder Tumours Using the Xpert Bladder Cancer Monitor (SEALS Xpert)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT04100733
Recruitment Status : Active, not recruiting
First Posted : September 24, 2019
Last Update Posted : April 26, 2022
Information provided by (Responsible Party):
Jørgen Bjerggaard Jensen, Aarhus University Hospital

Brief Summary:
The study aims to evaluate the potential clinical impact of a highly sensitive urinary marker, the Xpert Bladder Cancer Monitor, regarding possible reduction in number of flexible cystoscopies in an outpatient setting without decreasing recurrence-free survival or increasing risk of progression.

Condition or disease Intervention/treatment Phase
Non-muscle Invasive Bladder Cancer Urinary Biomarker Diagnostic Test: Xpert Bladder Cancer Monitor Diagnostic Test: Flexible cystoscopy (WL/NBI) and urinary cytology Phase 3

Detailed Description:

Epidemiology and treatment Bladder cancer is the 12th most diagnosed cancer worldwide with an incidence of approximately 550 000 new cases each year.1 A majority of the tumors are characterized as non-muscle invasive bladder cancer (NMIBC), meaning stage T1 according to the 2016 TNM-classification.2 Treatment of primary NMIBC is transurethral resection of the bladder (TUR-B) and treatment of recurring NMIBC is repeated TUR-B and often adjuvant instillation therapy with either Mitomycin C or Bacillus Calmette-Geerin (BCG) according to the histology of the tumor. NMIBC-tumors are graded into high grade (HG) and low grade (LG) according to the histological characteristics of their TUR-B specimen. Generally, intravesical Mitomycin C is recommended to treat LG tumors and intravesical BCG is recommended for treating HG tumors.3,4.

Follow-up schedules based on risk of recurrence. The histological grade, number of tumors, tumor size, T-stage, recurrence-rate and presence of carcinoma in situ (CIS) is used to estimate risk of recurrence according to the EORTC-scoring system. Based on the risk stratification, different follow-up schedules after initial TUR-B are planned. High risk tumors are followed-up with flexible cystoscopy and urinary cytology every four months until two recurrence-free years, whereas low and intermediate risk tumors are followed utilizing the 4-8-12 model where intervals between follow up are increased for patients without recurrence until 5 disease-free years.3 The evidence behind these follow-up schedules is not based on high level evidence and research but rather on tradition and 'clinical experience'.

Clinical challenge of current follow-up schedules The majority of patients with HG tumors will have recurrence despite treatment, especially within the two first years after diagnosis. Moreover, many patients will receive lifelong follow-up cystoscopy and urinary cytology tests. Follow-up schedules are costly due to many visits at the hospital for flexible cystoscopy, urinary cytology, and treatment. A micro-costing analysis performed by the Urological Research Unit at Aarhus University Hospital prior to initiation of the current study, has shown that the total expense in relation to flexible cystoscopy in the outpatient clinic is approximately 315 EUR per examination (Appendix 1). Equally important to frequency and cost of follow-up, every follow-up visit is associated with patient discomfort, pain, risk of infections, and strictures of the urethra.6 Each cystoscopy carries a 15% risk of complications. Nearly 1,500 cystoscopies are carried out in HG patients in Central Denmark Region each year, resulting in approximately 240 complications each year, with cystitis being the most common complication. Furthermore, flexible cystoscopy is not always reliable in terms of diagnosing recurrences and CIS.7-9

Urinary biomarkers A proposed alternative to flexible cystoscopy in the detection of recurrent NMBIC is non-invasive molecular urinary markers that detect mRNA, protein or DNA from selected genes relevant for bladder cancer in urine samples. Several studies have been prospectively validated and shown high sensitivity and specificity for urinary markers.10,11 Recently, the Xpert Bladder Cancer Monitor test was shown by Valenberg et al.12 to have a sensitivity of 83% and specificity of 76% for HG disease and similarly D'Elia et al.13 showed a specificity of 77% and sensitivity of 46% for a cohort of mainly LG patients. However, studies have until now focused mainly on detection of NMIBC in patients with incident tumors, which are most often larger and more easily diagnosed with urinary biomarkers than recurrences.14 To our knowledge, no studies have so far substituted cystoscopies for urinary biomarkers in a randomized controlled setting. Thus, the need for high level evidence regarding the use of urinary biomarkers for surveillance of NMIBC is still there.

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 392 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Diagnostic
Official Title: Surveillance of High-grade Non-muscle Invasive Bladder Tumours Using the Xpert Bladder Cancer Monitor
Actual Study Start Date : November 1, 2019
Estimated Primary Completion Date : April 2024
Estimated Study Completion Date : April 2027

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Bladder Cancer

Arm Intervention/treatment
Active Comparator: Control
Study subjects will cohere to current clinical guidelines for follow-up regimes of HG NMIBC with flexible cystoscopy and cytology every four months for a period of two years.
Diagnostic Test: Flexible cystoscopy (WL/NBI) and urinary cytology
Adhering to current danish guidelines for follow-up of non-muscle invasive bladder cancer.

Experimental: Intervention
Patients in the interventional arm will be followed at 4, 8, 16 and 20 months after inclusion with Xpert Bladder Cancer Monitor-test (and urinary cytology) instead of flexible cystoscopy.
Diagnostic Test: Xpert Bladder Cancer Monitor
Xpert Bladder Cancer Monitor detects mRNA fragments from 5 genes frequently overexpressed in non-muscle invasive bladder cancer.

Primary Outcome Measures :
  1. Recurrence-free survival [ Time Frame: 2 years follow-up per patient ]
    Time from inclusion to detection of recurrence of bladder cancer.

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Layout table for eligibility information
Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Age ≥18 years of age at the time of signing the Informed Consent Form
  • Ability to understand the Participant Information sheet orally and in writing
  • Signed Informed Consent Form
  • Is, according to the investigator's judgement, able to comply with the trial protocol
  • Previously diagnosed with high grade NMIBC Recurrence free at the time of inclusion detected by flexible cystoscopy

Exclusion Criteria:

  • History of any upper urinary tract tumor regardless of grade and stage within the last 5 years prior to randomization
  • T1 tumor where re-resection has not been performed
  • CIS or invasive tumor within 3 months before randomization

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT04100733

Layout table for location information
Hospital of West Jutland
Holstebro, Danmark, Denmark, 7500
Zealand University Hospital
Roskilde, Denmark
Aarhus University Hospital
Århus N, Denmark, 8200
Sponsors and Collaborators
Jørgen Bjerggaard Jensen
Layout table for additonal information
Responsible Party: Jørgen Bjerggaard Jensen, Professor, consultant, Aarhus University Hospital Identifier: NCT04100733    
Other Study ID Numbers: SEALS Xpert
First Posted: September 24, 2019    Key Record Dates
Last Update Posted: April 26, 2022
Last Verified: April 2022

Layout table for additional information
Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No
Keywords provided by Jørgen Bjerggaard Jensen, Aarhus University Hospital:
Flexible cystoscopy
Xpert Bladder Cancer Monitor
Additional relevant MeSH terms:
Layout table for MeSH terms
Urinary Bladder Neoplasms
Urologic Neoplasms
Urogenital Neoplasms
Neoplasms by Site
Urinary Bladder Diseases
Urologic Diseases