Hypofractionated Radiotherapy for Thymic Epithelial Tumors

This study is testing a shorter, more intense radiation treatment schedule (called hypofractionated radiotherapy) for people with thymic tumors — cancers that start in the thymus gland in the chest. Researchers want to know if this approach works as well as standard radiation while being more convenient for patients. **You may be eligible if...** - You are between 18 and 74 years old - You have been diagnosed with a thymoma (type A, AB, B1, B2, or B3) or thymic carcinoma, confirmed by a tissue biopsy - Your cancer is at an early to intermediate stage (stage I, II, or III) - You are in reasonably good health and able to carry out daily activities - Your doctor expects you to live at least one more year - You have adequate bone marrow and organ function **You may NOT be eligible if...** - You have already received radiation therapy to the chest - You have had a recent heart attack or have poorly controlled heart failure - You have an uncontrolled infection or serious mental illness - You have another cancer that is not under control - You have a known history of mental illness or substance abuse Talk to your doctor to see if this trial is right for you.