Assertion: stent | /r/HasProperty | difficult to remove
Facets:
value: very
type: DEGREE
value: rarely
type: DEGREE
Source sentences:
text: Rarely, if the stent becomes too stiff it may be difficult to remove and a major procedure may be required to remove it.
text: Stents are then very difficult to remove; often, they can be removed only by destruction of the stent and piecemeal removal of the wires endoscopically or through an external open approach.