This irritation causes scar tissue to form, and makes breathing difficult.
[cancer.gov]
A blocked bile duct may be caused by cancer or other conditions, such as gallstones, infection, or scar tissue.
[cancer.gov]
Bowel obstructions may be caused by a twist in the intestines, hernias, inflammation, scar tissue from surgery, and certain types of cancer, such as cancers of the stomach
[cancer.gov]