Precision radiation and immunotherapy join forces against inoperable stomach cancer

This study is testing a new way to give radiation therapy (called PULSAR) along with standard chemotherapy and immunotherapy for people with advanced stomach cancer that cannot be removed with surgery. The radiation is given in high doses every few weeks, tailored to each patient's tumor. The goal is to see if this combination can stop the cancer from growing for at least a year. The study plans to enroll 53 adults with a specific type of stomach cancer (HER2-negative, EBV-negative, and microsatellite stable).