CLE Characteristics of Upper Urinary Tract Urothelial Carcinoma
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|ClinicalTrials.gov Identifier: NCT03013920|
Recruitment Status : Completed
First Posted : January 9, 2017
Last Update Posted : June 6, 2018
Rationale: Initial evaluation usually consists of cross sectional imaging of the urinary tract. When a suspect lesion is seen, an ureterorenoscopy is planned to visualize the lesion and to collect tissue for histopathology. These techniques are considered to be the gold standard in diagnosis of UTUC. CLE, a high resolution imaging technique that can be used in combination with endo-urological procedures, seems promising to improve diagnosis of urothelial cancer. CLE image characteristics for UTUC still have to be defined.
Objective: With this IDEAL stage 2b explorative pilot study the investigators aim to assess in-vivo CLE image characteristics of normal urothelium, benign urothelium and urothelial carcinoma (low-grade, high-grade or CIS) of the upper urinary tract by qualitatively comparing CLE images with both histopathology from diagnostic biopsies and pathology from the therapeutic radical nephroureterectomy. Secondary objectives are the development of an imaging atlas and to assess the technical feasibility and procedure related adverse events of CLE.
|Condition or disease|
|Urinary Tract Cancer Urothelial Carcinoma Ureter Cancer|
This study is a prospective, mono-center observational human, in vivo pilot study to assess in-vivo CLE characteristics of normal urothelium, benign urothelium and urothelial carcinoma (low-grade, high-grade or CIS) of the upper urinary tract. Eligible patients have a suspect tumour in the upper urinary tract and are scheduled for a diagnostic URS. Eligible patients will be informed about this study by their urologist. Information about the study will be provided both verbally and in written form.
CLE images are recorded using a probe-based system (Cellvizio 100 series, Mauna Kea Technologies, Paris, France). The probe has a diameter of 0,85 mm, hereby enabling passage through the working channel of ureterorenoscope. It has a depth of tissue penetration of 50 µm, a field of view of 320 µm and a resolution of 3,5 µm. Images are collected at a scan rate of 12 frames per second. Using the Cellvizio Viewer system, we can observe mucosal microarchitecture with an increased field of view through mosaic post processing. This system also enables virtual staining of mucosal structures to further enhance tissue contrast.
A fluorescent contrast agent is needed to obtain CLE images. Fluorescein (fluoresceinedinatrium, Fresenius Kabi, Zeist, Nederland), a non-toxic and commonly used fluorescent dye will be administered through the working channel of the ureterorenoscope into the pyelocaliceal system (3 - 5 mL 0.1% fluorescein diluted in saline) and left indwelling for 5 minutes to stain the extracellular matrix.
In this study patients will undergo one CLE measurement during the planned diagnostic URS. We measure on average 2 regions of interest per patient. If a patient has multiple tumours we will do multiple measurements. The measurement duration per patient adds maximally 10 minutes during the URS. At a later stage two independent non-blinded observers will review the CLE images. The CLE images of the diagnostic URS are qualitatively compared with histopathology from diagnostic biopsies, and if performed also with pathology from the therapeutic nephroureterectomy.
Based on the UTUC diagnosis from the diagnostic URS, in general about one third of the patients are indicated for a therapeutic radical nephroureterectomy. The other two thirds of the UTUC patients are treated with endoscopic treatment. If patients undergo several ureterorenoscopies, they may be approached for CLE measurements at consecutive ureterorenoscopies.
|Study Type :||Observational|
|Actual Enrollment :||150 participants|
|Official Title:||A Prospective In-Vivo Human Pilot Study to Assess Confocal Laser Endomicroscopy Characteristics of Upper Tract Urothelial Carcinoma|
|Study Start Date :||August 2016|
|Actual Primary Completion Date :||April 2018|
|Actual Study Completion Date :||April 2018|
- In-vivo CLE measurements of normal urothelium and urothelial carcinoma (low-grade, high-grade or CIS) of the upper urinary tract [ Time Frame: 3 years ]The CLE measurements are qualitatively correlated to the corresponding histopathology
Biospecimen Retention: Samples With DNA
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 ClinicalTrials.gov identifier (NCT number): NCT03013920
|Academic Medical Center|
|Amsterdam, Netherlands, 1105AZ|
|Principal Investigator:||Jean J de la Rosette, prof. dr.||Academisch Medisch Centrum - Universiteit van Amsterdam (AMC-UvA)|