Radiation enteritis is swelling (inflammation) of the lining of the small intestine due to radiation therapy, a type of cancer treatment.
Anyone with cancer that requires radiation therapy to the belly area is at risk. This may include persons with cervical, uterine, or rectal cancer.
If the damage lasts only a short time, it is called acute radiation enteritis. If damage persists and causes long-standing inflammation in the intestine, it is called chronic radiation enteritis.
Chronic radiation enteritis results in long-term diarrhea.