The number of breast cancer survivors in the United States is rapidly growing due to advancements in the early detection and treatment of tumors. Upwards of 1/3rd of breast cancer patients whose diagnosis is treated conservatively (including surgery and radiotherapy) experience pain and restricted mobility within their treated shoulder within 5 years of treatment. Given the growing number of cancer survivors, clinicians need a better understanding regarding the time progression and pathophysiology of these shoulder complications. Our lab is currently examining breast cancer patients undergoing a variety of radiation therapy treatments to understand how the shoulder joint and its underlying muscles are affected after treatment is completed. With this information, we can better a patient’s clinical care to improve their post-cancer quality of life. This project is generously supported by a Susan G. Komen fellowship for Dr. Lipps.