Prospective Assessment of CONECCT's Classification for Colorectal Lesions.

Hospices Civils de Lyon750 enrolled

Overview

Colorectal neoplastic lesion endoscopic characterization is a key element for histological predictive diagnostic value in conducting best appropriate resection choice. Six classifications are necessary for fully correct characterization of different colorectal lesions. Nonetheless, it can be tricky to use so many diagnostic tools with so many subcategories in the 6 existing classifications. That's why we decided to integrate all 6 existing classification validated factors in one single chart (CONECCT chart) allowing to both predict histological diagnostic value and to propose the best appropriate resection strategy. A previous prospective and multicentre study with all French medical residents in gastroenterology was conducted in order to prove pedagogic interest of this diagnostic tool. Each student was asked to review 20 files with lesion pictures before and after lecture about CONECCT chart. This allowed us to prove that this diagnostic tool could significantly improve both histological predictive diagnostic value and therapeutic choice by French medical residents and gastroenterologists. Our hypothesis is that CONECCT's classification can improve predictive diagnostic value of colorectal lesions in over 80% of cases. Now that pedagogic interest of this diagnostic tool has been proven, we would like to carry out a larger prospective assessment in term of performance (value) of this instrument in order to both facilitate endoscopic characterization and allow a most appropriate diagnostic and therapeutic management of each colorectal lesion category.

Study Type

OBSERVATIONAL

Enrollment

750

Conditions

Colorectal Cancer

Eligibility

Sex: ALLMin age: 18 Years

Medical Language ↔ Plain English

* Inclusion Criteria : * both gender patients even or older than 18 years old * patient in need of proven diagnostic or therapeutic colonoscopy for colorectal lesion resection * patient with French Health Insurance coverage * obtaining of oral non opposition to research after loyal, clear and complete delivery of information * Exclusion Criteria : * previous attempt of lesion resection by mucosectomy * patient with a metastatic lesion diagnosed prior to colonoscopy * patient with no colorectal lesion * adenomatous or sessile serrated polyposis syndrome * patient with bowel chronic inflammatory disease

Outcomes

Primary Outcomes

Correlation between endoscopic CONECCT's classification

assessed by one of research site operators and final histology reading of neoplastic lesion by anatomopathologist: * CONECCT 0E : neuroendocrine tumor * CONECCT IH : hyperplastic polyp * CONECCT IS : sessile serrated lesion with or without dysplasia * CONECCT IIA : low or high grade adenoma * CONECCT IIC : low or high grade adenoma or intramucosal or submucosal \<1000 micron adenocarcinoma * CONECCT III : deep invasive submucosal \> 1000 microns adenocarcinoma

Time frame: Time point can be reached either 2 weeks after endoscopic resection at V1 or between 2-4 months later in case of surgery at V3