Retrieving whole bladder tumors with a bag device after removal through the urethra
Tests the CURTIS bag device for removing intact bladder tumors in adults.
Plain-language title generated from the registry record
Registry title: REtrieval of Transurethrally Resected Intact En-bloc Vesical Tumors Using a Retrieval Device for Bladder Tumors
Key facts
- Where
- Aarhus and Roskilde, DenmarkSee the 2 sites
AI summary: who the study is looking for
From the trial's eligibility criteria. Machine-read from the registry text on this page, so it can be wrong. The registry text below and the trial team decide who can take part.
The trial is looking for adults with a suspected first bladder cancer that has not grown into the bladder muscle. The tumor is planned to be removed in one piece, and a retrieval device will be used to take it out.
- Age
- 18 years or older
- Sex
- All sexes
- Disease stage
- Suspected first (primary) non-muscle invasive bladder cancer, stage pTa or pT1, with no sign of muscle-invasive disease. One or more tumors, the largest about 50 mm or smaller.
- Earlier treatment
- Planned elective transurethral resection of the bladder tumor as an en-bloc (one-piece) resection. No bladder tumor removed in the past 24 months.
Main reasons for not taking part
- Known or suspected muscle-invasive bladder cancer (cT2 or higher)
- Recurrent bladder tumor (a bladder tumor removed in the past 24 months)
- Active untreated urinary tract infection at the time of surgery
- Blood clotting problem that cannot be corrected, or blood thinners that cannot be safely paused
- Severe narrowing of the urethra that blocks the resectoscope
Read by machine on 9 November 2026.
Where in Denmark
- Department of Urology, Aarhus University Hospital, AarhusAarhus, DenmarkNo longer taking part
- Zealand University Hospital, RoskildeRoskilde, DenmarkNo longer taking part
Questions to ask the study team
- How often do I need to come in, and for how long each time?
- Are travel costs paid?
- Can I keep my own doctor?
- What happens if I want to stop?
Trial details
- Who runs it
- Ludwig-Maximilians - University of Munich
- Trial code
- NCT07762820
- Record updated
- 17 August 2026
- Original description
Bladder cancer is the most common malignancy of the urinary tract, and approximately 75% of cases are non-muscle invasive (NMIBC) at diagnosis. The standard treatment is transurethral resection of the bladder tumor (TURBT). En bloc resection (EBR-T), in which the tumor is removed in one intact piece rather than fragmented, offers superior pathological specimen quality and may reduce the need for repeat resections. However, extracting the intact specimen from the bladder through the urethra remains a critical technical challenge, particularly for larger tumors.Read full original descriptionShow less
REtrieval of Transurethrally Resected Intact En-bloc Vesical Tumors Using a Retrieval Device for Bladder Tumors - A Prospective Multicenter Feasibility Study
Bladder cancer is the most common malignancy of the urinary tract, and approximately 75% of cases are non-muscle invasive (NMIBC) at diagnosis. The standard treatment is transurethral resection of the bladder tumor (TURBT). En bloc resection (EBR-T), in which the tumor is removed in one intact piece rather than fragmented, offers superior pathological specimen quality and may reduce the need for repeat resections. However, extracting the intact specimen from the bladder through the urethra remains a critical technical challenge, particularly for larger tumors.
CURTIS (Urotech GmbH) is a CE-marked retrieval device consisting of a hydrophilic-coated bag that can be opened and closed via a handpiece, enabling controlled capture and safe transurethral extraction of the resected tumor specimen.
This study aims to evaluate the technical feasibility of CURTIS-assisted intact specimen retrieval following en bloc transurethral resection of primary NMIBC. The central question the study seeks to answer is: in what proportion of cases can CURTIS successfully retrieve an intact en bloc resected bladder tumor, and what is the maximum tumor size for which intact retrieval remains feasible?
Inclusion: Age ≥18 years at the time of enrollment; Suspected primary non-muscle invasive bladder cancer (NMIBC; stage pTa or pT1) based on cystoscopic assessment, with no radiological or clinical evidence of muscle-invasive disease; Solitary or multiple bladder tumors with an estimated largest diameter of ≤50 mm based on flexible or rigid cystoscopic assessment (or cross-sectional imaging if available); Clinical indication for elective transurethral resection of the bladder tumor, planned to be performed as en-bloc resection; Written informed consent obtained prior to any study-related procedure; Ability to understand the study procedures and willingness to comply with study requirements.
Exclusion: Recurrent bladder tumor (prior history of bladder tumor resection within the past 24 months); Known or clinically suspected muscle-invasive bladder cancer (MIBC; cT2 or higher) based on cystoscopy or imaging; Active untreated urinary tract infection at the time of surgery (requiring postponement and re-evaluation); Inability to provide written informed consent (e.g., due to cognitive impairment or language barrier without translation support); Uncorrectable coagulopathy or anticoagulation that cannot be safely paused perioperatively; Severe urethral stricture precluding standard resectoscope passage.