Assertion: polyp | /r/HasProperty | treated by colectomy
Facets:
Source sentences:
text: Malignant polyps with involvement within 2 mm of the margin of resection or with nonassessable margins, polyps with invasion of the submucosa of the bowel wall (especially if there is less than 2 mm margin of clearance), and polyps containing poorly differentiated invasive carcinoma should be treated by colectomy unless the surgical risk is prohibitive.