Efficacy and Safety of Thalidomide Combined With Glutamine in the Treatment of Radiation Intestinal Injury.

Inclusion Criteria: * Age 18-80 years old, gender is not limited; * Patients with hematochezia symptoms of chronic radiation intestinal injury: Due to the lack of diagnostic gold standard for radiation intestinal injury, a comprehensive analysis of clinical, endoscopic, imaging and histopathological findings was mainly performed to make the diagnosis of radiation intestinal injury on the basis of excluding infectious and other non-infectious intestinal injuries. Exposure to radioactive sources is a necessary factor in the diagnosis of radiation intestinal injury, and tumor activity or recurrence should be excluded. * The proportion of dominant defecation bleeding in total defecation times in the week before treatment is not less than 20%; * ECOG score: 0-2. Exclusion Criteria: * Patients with hemodynamic instability; * Patients with obvious liver and kidney function injury: bilirubin, aminotransferase (ALT, AST) exceeded the upper limit of normal by 2 times; eGFR\<60ml/min or dialysis patients; * Patients allergic to thalidomide or glutamine; * Patients whose primary disease was gastrointestinal malignancy; * Patients currently suffering from serious or uncontrolled underlying diseases of the blood, digestive tract, metabolism, endocrine, lung, heart, nervous system, mental system, etc.; * Female patients during pregnancy and breastfeeding (including patients with reproductive needs); * Patients infected with HIV; * Patients who cannot cooperate with regular follow-up and review of laboratory indicators; * any other circumstances which, in the opinion of the investigator, would render the subject unfit for study inclusion.