WASP Classification in Diagnosis of Diminutive Colorectal Polyps

Summary

Adenomas, serrated adenomas and hyperplastic polyps are polypoid lesion in the colorectum. At the present moment, all polyps should be resected endoscopically, although only adenomas and serrated adenomas, but not hyperplastic polyps have the potential to develop colorectal cancer. Some studies have investigated the value of the narrow-band imaging (NBI) on histological prediction of the polyp. This method is conducted in real time during colonoscopy, which leads to simplification of diagnostic procedures. For instance, it would be conceivable to resect diminutive polyps and discard them without further assessment by a pathologist. One problem in this context is a correct differentiation between hyperplastic polyps and serrated adenomas. These two polyp entities are known to show similar optical features. However, while serrated adenomas are premalignant lesions hyperplastic polyps have benign histology and never develop into cancer. It is therefore important to sufficiently distinguish hyperplastic polyps from serrated lesions.

In this study the investigators want to investigate whether the use of NBI would be capable to get accuracy of optical polyp predictions by more than 90% using the WASP (Workgroup serrAted polypS and Polyposis) classification. NBI is a light filter tool which can be activated by pressing a button at the endoscope. The use of NBI leads to an endoscopic picture which appears blue and enables endoscopists to better assess surface structures and vascular patterns. All polyps will be resected and send to pathology for further microscopic assessment. After completing the trial the investigators aim to compare accuracy of the optical diagnosis.

Conditions

• Diminutive Colorectal Polyps

Interventions

DEVICE

NBI

optical assessment of diminutive colorectal polyps by NBI mode using the WASP assessment

Sponsors & Collaborators

• Beijing Friendship Hospital

  collaborator OTHER

• Jilin People's Hospital

  collaborator UNKNOWN

• Wafangdian Third Hospital

  collaborator UNKNOWN

• Dezhou People's Hospital

  collaborator OTHER

• Liaocheng People's Hospital

  collaborator OTHER

• Wenzhou Central Hospital

  collaborator OTHER

• Yichun People's Hospital

  collaborator UNKNOWN

• The Third Xiangya Hospital of Central South University

  collaborator OTHER

• Shenzhen Baoan People's Hospital

  collaborator UNKNOWN

• Xinxiang Central Hospital

  collaborator OTHER

• Wuwei Cancer Hospital

  collaborator UNKNOWN

• Zunyi Medical College

  collaborator OTHER

• Yaan People's Hospital

  collaborator UNKNOWN

• Shanghai Jiao Tong University School of Medicine

  lead OTHER

Study Design

Allocation

NA

Purpose

DIAGNOSTIC

Masking

NONE

Model

SINGLE_GROUP

Eligibility

Min Age

18 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2019-04-15

Primary Completion

2022-12-30

Completion

2023-05-30

Countries

• China

Study Locations