{"entity":{"id":"paris-endoscopic-classification","kind":"term","name":"Paris endoscopic classification of superficial neoplastic lesions","aka":["Paris classification","Paris endoscopic classification","0-IIa","0-IIb","0-IIc","0-Is","0-Ip"],"tldr":"The Paris classification is the shorthand (0-Ip, 0-Is, 0-IIa and so on) an endoscopist uses to describe the shape of an early growth in the gullet, stomach or bowel, which hints at how deep it may go.","summary":"The Paris workshop of 2002 produced an endoscopic classification of superficial neoplastic lesions of the oesophagus, stomach and colon (Gastrointestinal Endoscopy 2003). A review of non-polypoid colorectal lesions (Facciorusso and colleagues, World Journal of Gastroenterology 2015) summarises the flat types: slightly elevated 0-IIa (under 2.5 mm), flat 0-IIb and slightly depressed 0-IIc. Depressed lesions carry a higher risk of invasion into the submucosa even when small, which affects whether a lesion can be removed endoscopically.","asOf":"2026-11-04","links":[{"label":"Participants in the Paris Workshop, The Paris endoscopic classification of superficial neoplastic lesions: esophagus, stomach, and colon (Gastrointest Endosc 2003)","url":"https://doi.org/10.1016/s0016-5107(03)02159-x"},{"label":"Facciorusso et al., Non-polypoid colorectal neoplasms: classification, therapy and follow-up (World J Gastroenterol 2015)","url":"https://doi.org/10.3748/wjg.v21.i17.5149"}],"tags":[],"related":["colonoscopy","endoscopy","jnet-classification","vienna-classification"],"cancers":["colorectal","esophageal","gastric"],"sections":[],"technologies":[],"targets":[],"drugs":[],"companies":[],"institutions":[],"pathways":[],"terms":[],"trials":[],"people":[],"bottlenecks":[],"keyPapers":[],"journals":[],"dependsOn":[],"notes":[],"category":"Diagnostics & imaging"},"route":"/terms/paris-endoscopic-classification/","neighbours":{"term":[{"id":"barretts-esophagus","kind":"term","name":"Barrett's oesophagus","route":"/terms/barretts-esophagus/"},{"id":"colonoscopy","kind":"term","name":"Colonoscopy","route":"/terms/colonoscopy/"},{"id":"endoscopy","kind":"term","name":"Endoscopy (EGD, EUS, ERCP)","route":"/terms/endoscopy/"},{"id":"jnet-classification","kind":"term","name":"JNET classification (colorectal tumours on narrow-band imaging)","route":"/terms/jnet-classification/"},{"id":"vienna-classification","kind":"term","name":"Vienna classification of gastrointestinal epithelial neoplasia","route":"/terms/vienna-classification/"}],"cancer":[{"id":"colorectal","kind":"cancer","name":"Colorectal cancer","route":"/cancers/colorectal/"},{"id":"gastric","kind":"cancer","name":"Gastric & gastro-oesophageal junction cancer","route":"/cancers/gastric/"},{"id":"esophageal","kind":"cancer","name":"Oesophageal cancer","route":"/cancers/esophageal/"}]}}