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Clinical Trial Details — Status: Recruiting

Administrative data

NCT number NCT04010734
Other study ID # UHO001
Secondary ID
Status Recruiting
Phase N/A
First received
Last updated
Start date May 6, 2019
Est. completion date June 7, 2022

Study information

Verified date June 2019
Source University Hospital Olomouc
Contact Vincent Zoundjiekpon, MD
Phone 00420608080209
Email vincent04@post.cz
Is FDA regulated No
Health authority
Study type Interventional

Clinical Trial Summary

The management of biliary strictures depends on their correct pre-operative evaluation which remains challenging. Despite the emerging multitudes of new diagnostic opportunities and modalities which exist today, there is still a large number of biliary stenosis misdiagnosed with a profound negative impact on the patients´ outcome. The study´s aim is to compare the diagnostic yield of primary peroral cholangioscopy and ERCP (with conventional sampling - brushing and forceps biopsy - completed with the FISH) in patients with suspected malignant stricture of the common bile duct and to evaluate the impact of both methods on the management of patients with biliary stricture.


Description:

The management of biliary strictures depends on their correct pre-operative evaluation which remains challenging. Biliary strictures have various etiologies (traumatic, inflammatory, tumoral, ischemic etc), which are necessarily needed to be known for the correct therapeutic approach. Despite the emerging multitudes of new diagnostic opportunities and modalities (laboratory, radiological, endoscopic, histopathologic and immunohistological) which exist today, there is still a large number of biliary stenosis misdiagnosed with a profound negative impact on the patients´ outcome. The dilemma that exists is how to balance the risk of missing the chance of curative surgery for some malignancy and preventing some patients from unnecessary surgery for benign etiologies and not to waste time. Therefore, diagnostic methods which can maximize the chance of the preoperative diagnosis of indeterminate biliary strictures are needed.

This study will:

compare two methods helping in the diagnosis of suspected malignant biliary stricture-SMBS evaluate the impact of both methods on the management of patients with biliary strictures.

- ERCP (Endoscopic retrograde cholangiopancreatography) is the most widely used diagnostic procedure in patients with biliary obstruction. It enables to identify the biliary stricture, to determinate its location and help providing tissue sampling from the stricture for cytological evaluation. Different methods were used to take samples from the site of the stenosis. Brush-cytology and endocanal forceps biopsies were the most used techniques, both with differents specificity a sensitivity. It was demonstrated by different studies, that Fluorescence in Situ Hybridization (FISH) improved the diagnostic yield of routine cytology. That is the reason why the investigators are going to combine FISH with the conventional sampling methods to maximize the chance to determine the etiology of stenosis early and avoid wasting time.

- The peroral cholangioscopy (DSOC), one of a newer method of endocanal exploration via ERCP- commonly known as the SpyGlass - helps to provide the visual diagnostics of the strictures based on morphological and vascular patterns and to provide directed intraductal biopsy (SpyBite) from the lesions. The combination of both methods should increase the diagnostic yield in the evaluation of indeterminate biliary stricture by DSOC. Because of its high costs, the DSOC is mostly provided later, that is when the ERCP cytology failed (secondary DSOC). This wasted time can be important and determinable for the patients´ outcome. So primary cholangioscopy could help in the correct management of patients with indeterminate biliary stricture, without wasting time.

The study will compare the primary DSOC to ERCP. Success (positivity) is defined by the presence of benign or malignant cells, adequate to make the final tissue diagnosis. Another examination should be performed in situations where the initial method failed.

Gold standard for final diagnosis should be the histology from surgery resection. In patients without surgery, clinical evaluation and cross-over methods are used for comparison of initial methods.


Recruitment information / eligibility

Status Recruiting
Enrollment 66
Est. completion date June 7, 2022
Est. primary completion date December 20, 2021
Accepts healthy volunteers No
Gender All
Age group 18 Years to 95 Years
Eligibility Inclusion Criteria:

1. Suspected malignant biliary stricture

2. Localization: Extrahepatic biliary duct

3. Patient´s consent with a diagnostic procedure

4. Age : 18 years or more

Exclusion Criteria:

1. Intrahepatic biliary strictures

2. Duodenal stenosis (endoscopically)

3. Age : < 18 years

4. Coagulopathy :

(INR >1,5, Platelets < 100)

5. Pregnancy

Study Design


Related Conditions & MeSH terms


Intervention

Procedure:
Peroral Cholangioscopy and Endoscopic retrograde cholangiopancreatography
The peroral cholangioscopy (DSOC), one of a newer method of endocanal exploration via ERCP- commonly known as the SpyGlass - helps to provide the visual diagnostics of the strictures based on morphological and vascular patterns and to provide directed intraductal biopsy (SpyBite) from the lesions. The combination of both should increase the diagnostic yield in the evaluation of indeterminate biliary stricture by DSOC. ERCP is the most widely used diagnostic procedure in patients with biliary obstruction. It enables to identify the biliary stricture, to determinate its location and help providing tissue sampling from the stricture for cytological evaluation. Different methods were used to take samples from the site of the stenosis. Brushing and endocanal forceps biopsies were the most used techniques. The samples from these two techniques will be additionaly examinated using Fluorescence in Situ Hybridization (FISH).

Locations

Country Name City State
Czechia 2nd Department of Internal Medicine, University Hospital and Palacký University, Olomouc, Czech Republic Olomouc 1 Olomouc

Sponsors (1)

Lead Sponsor Collaborator
University Hospital Olomouc

Country where clinical trial is conducted

Czechia, 

Outcome

Type Measure Description Time frame Safety issue
Primary compare the diagnostic yield of the primary peroral cholangioscopy and the ERCP in patients with suspected malignant biliary stricture - SMBS The the sensitivity (%) and specificity (%) of primary Peroral Cholangioscopy and ERCP(with conventional tissue sampling completed with FISH) in patients with suspected malignant stricture of the common bile duct are evaluated. Success (positivity) is defined by the presence of benign or malignant cells, adequate to make the final tissue diagnosis. Based on the previous studies and the experiences of our endoscopists and pathologist, we can expect the diagnostic yield of primary SpyGlass around 92% and of the second method around 75% in the study population (the samples size 66). 1-7 days
Primary evaluate the impact of both methods on management of patients with biliary stricture. The proportion of patients (%) who will miss the chance of curative surgery for some malignancy and the proportion of patients (%) who will not have unnecessary surgery for benign etiologies are evaluated in each group. 3-6 months
Primary evaluate the cost-effectiveness of both methods on management of patients with biliary stricture. The ratio cost (USD)/diagnostic yield(%) of both methods is evaluated and compared. 3-6 months
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