Observation of Microvessels and Invasion in Early Colorectal Lesions by NBI

Study Overview
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Brief Summary
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Combined with magnifying endoscopy,narrow-band imaging (NBI) contrasts microvascular architecture on lesion surface.The histology of early colorectal lesions could be predicted under NBI view.However,its capability for estimating invasion depth remains to be verified.The study is based on the hypothesis:NBI can predict histology and invasion depth,combined with the verification of microvessel count and MMP-7 expression.

Detailed Description
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The microvessel count (MVC) is a classical method of assessing histologic grade.To verify whether NBI could predict histology through microvascular architecture,we measured lesion microvessels by immunohistochemistry.On the other hand,we applied immunohistochemistry of matrix metalloproteinase-7 (MMP-7) to validate the capability of NBI for estimating invasion depth.MMP-7 is directly involved in the processes of growth, invasion, and metastasis of colorectal cancer.Our target was to clarify the diagnostic accuracy of magnifying NBI in early colorectal lesions,combined with the verification of microvessel count and MMP-7 expression.

Official Title
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Observation of Microvessels and Invasion in Early Colorectal Lesions by Narrow Band Imaging:Combination With Microvessel Count and MMP-7 Expression

Conditions
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Colorectal Neoplasms

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: patients of early colorectal lesions with capillary pattern(CP) type II&III,initially detected by white-light view and then examined by NBI with magnifying endoscopy. Exclusion Criteria: lesions with CP type I; CP type III lesions with an obvious appearance of advanced cancer; lesions that had underwent biopsy; patients with inflammatory bowel disease(IBD) or familial adenomatous polyposis(FAP) patients with previous colorectal surgery; having conditions associated with cardiac,hepatic,renal,and coagulopathy diseases.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 90 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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What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| NBI prediction for lesion histology and invasion | We will receive the histologic findings in two weeks after lesion treatment.Then we can compare NBI prediction with the final histologic type. | in two weeks after lesion treatment | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| immunohistochemical outcome of microvessel count and MMP-7 | We will receive the immunohistochemical outcome in three days after immunohistochemistry.Then we can compare NBI prediction with immunohistochemical outcome | in three days after immunohistochemistry | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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narrow band imaging,microvessels,matrix metalloproteinase-7