The present invention provides a new method of ameliorating and/or treating enteritis induced by radiation therapy, alone or in combination with other therapies, for the treatment oil for example, gastrointestinal malignancies, including colorectal, appendiceal, anal, or small bowel cancers； urogenital malignancies, including prostate, bladder, testicular, or penile cancers； gynecologic malignancies, including cervical, endometrial, ovarian, vaginal, or vulvar cancers； or osteogenic and other sarcomatous malignancies in which pelvic structures are involved, comprising the administration of a therapeutically effective amount of balsalazide to a patient in need thereof
