When are the colon polyps considered dangerous? what can be done in treating a large polyp, just surgery?

Colon polyps: Can be cancerous or precancerous. They can be removed colonoscopically or surgically. Talk with a GI endowcopist about your options.

Adenomas: During colonoscopy, one cannot tell whether a polyp is benign, pre-cancerous (adenomas) or malignant - so polyps are removed for pathology. When small, polyps are removed as a whole. In larger polyps, these can be challenging to remove, pieces are often taken and if cancerous, then surgery is required. In some cases, endoscopic submucosal dissection, an advanced technique can be attempted.

Although most polyps: Are benign, you cannot tell until they are looked at under the microscope. Most are easily removed during colonoscopy, but larger ones may require surgery. Large ones cannot just be biopsied and left in place, since there may be foci of cancer in areas not biopsied, or they may become cancerous later.