A Phase I/II study to evaluate the safety and preliminary efficacy of human umbilical cord-derived mesenchymal stem cell injection for the treatment of chronic radiation proctitis.
Fully understand and sign the informed consent form;
Age ≥18 years and <80 years;
Good physical condition (WHO performance status score 0-1);
Pathologically diagnosed with pelvic malignant tumors and received radiotherapy;
Patients with severe liver or kidney dysfunction during the screening period;
Patients with severe congestive heart failure or coronary artery disease during the screening period;
Patients with allergic constitution or severe systemic immune diseases;
Patients with active gastrointestinal bleeding or acute intestinal obstruction during the screening period;