Colonic JNET staging is a staging of endoscopic findings of colonic polyps developed in Japan in 2014, which is mainly categorized into 3 types, of which type 2 includes type 2A and type 2B.
Type 1: endoscopic absence of blood vessels or only isolated filamentous blood vessels on the surface of the lesion, with black or white dots on the surface, similar to the surrounding normal mucosa, with pathology suggestive of hyperplastic polyps or non-tipped serrated adenomas, and follow-up observation is usually sufficient.
Type 2A: the thickness and distribution of microvessels are regular, may be lattice or spiral, the surface has regular tubular, branching or papillary structures, generally suggests low-grade intraepithelial neoplasia, and can be treated with endoscopy.
Type 2B: the thickness and distribution of blood vessels are irregular, and the surface structure is blurred, which generally suggests submucosal superficial invasive carcinoma or high-grade intraepithelial neoplasia, and the treatment is mostly endoscopic, preferably complete resection.
Type 3: the vascular area is more sparse, there may be interrupted thicker blood vessels, the surface is amorphous area, which often suggests submucosal deep invasive carcinoma, and surgical treatment is needed.
Colonic JNET staging has greater clinical application value, which can suggest the diagnosis of the disease and guide the treatment mode, so it is more widely used.