Longitudinal Bladder Cancer Study for Tumour Recurrence (LOBSTER)

Pacific Edge

Status: Enrolling

Conditions: Urothelial Bladder Cancer

Treatments: Diagnostic Test: CxBladder Monitor/Monitor+

Study type: Observational

Funder types: Industry

Identifiers

NCT05080998

CXBM/2021/VA

Details and patient eligibility

About

Surveillance for recurrence of urothelial carcinoma (UC) requires frequent cystoscopy, which is invasive, expensive and time-consuming. An accurate urinary biomarker has the potential to reduce the number of cystoscopies required during post-treatment surveillance. This is a prospective, single arm, multi-center study using the diagnostic CxBladder test with subjects previously diagnosed with primary or recurrent UC and who are undergoing a schedule of investigative cystoscopies and treatment for the possible recurrence of UC presenting to qualified sites. To evaluate the performance characteristics of the CxBladder test, multiple consecutive urine samples will be collected during the course of surveillance.

Full description

This is a multi-site study recruiting subjects from Veterans Affairs and other medical centers. Subjects will be prospectively recruited to an observational study to validate the performance characteristics of CxBladder Monitor test (Monitor) and the second-generation test, CxBladder Monitor Plus (Monitor+). The study will recruit low, intermediate, and high-risk surveillance subjects, defined as per American Urological Association (AUA) / Society of Urologic Oncology (SUO) guidelines 2016 amendment 2020, previously diagnosed with urothelial carcinoma (UC). Eligible subjects will include those under surveillance for recurrence of UC. A voided urine sample will be collected from each enrolled subject at each of 4 successive surveillance visits. The collected urine will be used for CxBladder testing and central urine cytology. The study will collect primary tumour tissue from the first confirmed tumour, i.e., the primary diagnosis of UC (if available) and any subsequent collections within 12 weeks. Tissue samples from any UC recurrences while in study will also be collected to genotype each tumour using RNA or DNA markers indicative of an elevated risk of UC. Monitor/Monitor+ results will not be reported to patients or physicians. This study primarily aims to clinically validate the performance characteristics (sensitivity, specificity, negative predictive value, positive predictive value, and test-negative rate) of the Cxbladder Monitor/Monitor+ test compared to the reference standard i.e., tumours observed by cystoscopy and confirmed by pathology over a maximum of 4 surveillance visits. Sites are required to be competent in recruiting and completing required test request forms, Case Report Forms (CRF) and sample collection in a professional manner in accordance with good clinical practice (GCP).

Enrollment: 450 estimated patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

1. Low-, intermediate-, and high-risk surveillance subjects with a previous confirmed diagnosis or recurrence of urothelial carcinoma within the last 3 calendar years.
2. Subjects must agree to 4 successive study visits, including urine sample collection at each visit.
3. Physically able to provide a voided urine sample (a sample from catheterization is not eligible).
4. Able to give written informed consent
5. Able and willing to comply with study requirements
6. Aged 18 years or older

Exclusion criteria

1. Total cystectomy of the bladder, subjects with neo-bladders or illeal conduits
2. Previous muscle invasive bladder tumour (pT2 or greater)
3. Known pregnancy

Deferral Criteria

1. Prior genitourinary manipulation (catheterisation, urethral dilation, cystoscopy, etc.) within 14 calendar days of the scheduled urine collection, study enrollment with urine sample collection for Cxbladder Monitor testing should be deferred until a minimum of 14 calendar days has passed since the procedure was performed.
2. Active urinary tract infection (UTI) within 14 calendar days of the scheduled urine collection, study enrollment with urine sample collection for Cxbladder Monitor testing should be deferred until the treatment is complete and the UTI is resolved.
3. If a subject has had intravesical immunotherapy or chemotherapy within the previous 6 weeks, study enrollment with urine sample collection for Cxbladder Monitor testing should be deferred. Study enrollment must be at least 28 calendar days post-last treatment.

Trial design

450 participants in 1 patient group

Single arm - Patients undergoing surveillance for UC recurrence

Description:

Subjects previously diagnosed with UC and are undergoing a schedule of surveillance cystoscopies and treatment for the possible recurrence of UC will be recruited. Low-, intermediate-, and high-risk groups, according to AUA /SUO risk categorisation for non-muscle invasive UC, will be eligible for this study. All subjects will undergo CxBladder urine diagnostic testing.

Treatment:

Diagnostic Test: CxBladder Monitor/Monitor+