What cancers are found during endoscopy?

Colon cancers: If you are referring to a colonoscopy, which is a lower gastrointestinal endoscopy, then they might find polyps or colon cancer. On the other end, there are upper endoscopes (egds) which look at the esophagus and stomach and first part of the small intestine and there could be cancers found there too.

Depends: If upper GI -through mouth- then can find and biopsy esophageal, stomach and duodenal and some biliary cancers, depending on technique. Can also id varices -engorged veins- and evidence of acid damage. Colonoscopy can diagnose colon polyps and cancers as well as hemorrhoids and diverticuli.

Mucosal: Endoscopy refers to a camera down the upper GI via the mouth; thus mucosal-based cancers (adenocarcinoma and squamous carcinoma) of the esophagus, stomach, and maybe duodenum might be seen. Because the camera is in the lumen, cancers which are inside the wall (such as gist) and not extending to the inner surface (mucosa) may not be seen.