Total Body Irradiation Treatments for Patients Treated at European Institute of Oncology

This registry study is collecting data on patients who receive total body irradiation (TBI) — a type of full-body radiation therapy — as preparation for a bone marrow or stem cell transplant. The goal is to better understand outcomes, side effects, and treatment patterns over time. **You may be eligible if...** - You are a patient who is receiving or has received total body irradiation as part of preparation for a bone marrow or stem cell transplant - You have provided signed informed consent **You may NOT be eligible if...** - You are not undergoing total body irradiation Talk to your doctor to see if this trial is right for you.