Differentiation of Tubular Adenoma and Colonic Innominate Groove Under EC Endoscopy

Study Overview
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Brief Summary
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This study is to analyze the characteristics of the IIIL opening of the duct in tubular adenoma and the colonic innominate groove under EC endoscopy, in order to improve the ability to tell lesions and the colonic innominate groove under EC endoscopy (Endocytoscopy).

Detailed Description
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This is a prospective cohort study. The recruitment time for all participants will be 4 months. The tubular adenoma group and the colonic innominate groove group will be paired in a 1:2 ratio, with 32 lesions of tubular adenoma and 64 adjacent innominate groove. It is expected that there will be 32 cases and a total of 96 observation subjects. Analyze and compare the characteristics of the opening of the IIIL duct in tubular adenomas and the colonic innominate groove under EC endoscopy, in order to summarize and differentiate them.

Official Title
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Differentiation of Tubular Adenoma IIIL Duct Opening and Colonic Innominate Groove Under EC Endoscopy

Conditions
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Endocytoscopy

Intervention / Treatment
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* Procedure: The tubular adenoma group


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Cases of colorectal polyps discovered in our hospital and undergoing EC endoscopic examination. Exclusion Criteria: 1.Suffering from hereditary polyposis or inflammatory bowel disease, severe intestinal inflammation, or difficulty recognizing normal intestinal mucosa; 2. History of methylene blue allergy; 3. Patients who have participated or are currently participating in other clinical trials within the first 4 weeks of enrollment;

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 80 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| The tubular adenoma group<br>The anatomical site was determined, and the size and morphology of the polyps were observed. The classification of the microvascular ECV of the polyps and its adjacent normal mucosal microvascular ECV (white light+NBI) was observed, and methylene blue staining was used to approach and magnify the glandular duct opening to observe the IIIL type (pit pattern). Magnified to the maximum magnification of EC endoscopy to the clearest cell level (approximately 520 times), and observed the morphology of the opening of the IIIL type glandular duct and the opening of the colonic innominate groove, including the morphology of cell cytoplasm and nucleus, proportion of opening length to field of view (more than 1 field of view is calculated as 1.0), and ratio of maximum to minimum opening diameter; Distribution characteristics of glandular duct openings. | Procedure: The tubular adenoma group<br>* Biopsy or removal of polyps for pathological examination. Collect baseline data such as gender, age, BMI, etc. If the pathology confirms a pure tubular adenoma, the observed object will be included in the group for final comparative analysis.<br>* Other names: the colonic innominate groove group;|
| the colonic innominate groove group<br>The methylene blue staining area of the normal mucosa adjacent to the polyp was observed to identify the colonic innominate groove.Magnified to the maximum magnification of EC endoscopy to the clearest cell level (approximately 520 times), and observed the morphology of the opening of the IIIL type glandular duct and the opening of the colonic innominate groove, including the morphology of cell cytoplasm and nucleus, proportion of opening length to field of view (more than 1 field of view is calculated as 1.0), and ratio of maximum to minimum opening diameter; Distribution characteristics of glandular duct openings. | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Proportion of opening length to field of view | (more than 1 field of view is calculated as 1.0) | 10 minutes after the observation of Endocytoscopy | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Observation of anatomical location | The anatomical site (ileocecal region, ascending colon, hepatic flexure, transverse colon, Colonic splenic region, descending colon, sigmoid colon, rectum) | 10 minutes after the observation of Endocytoscopy | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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tubular adenoma, IIIL duct opening, colonic innominate groove