Assertion: regular colonoscopy | /r/CapableOf | look for precancerous changes
Facets:
value: in the colon lining
type: LOCATION
Source sentences:
text: Patients with a long history (greater than 10 years) of chronic ulcerative colitis have an increased risk of colon cancer and should have regular colonoscopies to look for precancerous changes in the colon lining.