Short-Course vs Standard-Course Radiation for Soft Tissue Sarcoma

This clinical trial compares the effect of short-course ultrahypofractionated radiation therapy over 5 days (UHRT-5) to standard-course radiation therapy over 25 days (RT-25) in treating patients with soft tissue sarcomas of the extremities that may be primary or that may have come back to nearby tissue or lymph nodes after a period of improvement (locally recurrent) and that can be removed by surgery (resectable). Radiation therapy uses high energy x-rays, particles, or radioactive seeds to kill tumor cells and shrink tumors. 3-dimensional (3D) conformal radiation therapy (CRT) uses a computer to create a 3D picture of the tumor. This allows doctors to give the highest possible dose of radiation to the tumor, while sparing the normal tissue as much as possible. Intensity-modulated radiation therapy (IMRT) is a type of 3D radiation therapy that uses computer-generated images to show the size and shape of the tumor. Thin beams of radiation of different intensities are aimed at the tumor from many angles. This type of radiation therapy reduces the damage to healthy tissue near the tumor. Standard-course (fractionated) radiation divides the total dose of radiation therapy into several smaller, equal doses delivered over a period of several days. Ultrahypofractionated radiation therapy delivers higher doses of radiation therapy over a shorter period of time and may kill more tumor cells and have fewer side effects. Giving UHRT-5 may be as effective as RT-25 in treating patients with primary or locally recurrent soft tissue sarcomas of the extremities that are resectable. It may also improve quality of life by requiring fewer treatments.