Assertion: colonoscopy | /r/HasProperty | required
Facets:
Source sentences:
text: A colonoscopy may be required when symptoms of digestive disease or other warning signs are present, for example, rectal bleeding (which may appear as bright red, very dark, or black); pain in the lower abdomen; changes in bowel habits; non-dietary weight loss
text: If a complication occurs, treatment including antibiotics, blood transfusion, hospitalization, repeat colonoscopy or surgery may be required.