Could surgery extend life in advanced stomach cancer after a good response to therapy?

This trial asks a key question: for people with advanced metastatic stomach cancer whose tumors shrink significantly after initial medical therapy (called conversion therapy), does adding radical surgery improve their chances of living longer without the disease progressing? The study will compare two approaches: one group receives surgery to remove the primary tumor and any remaining metastatic lesions, while the other group continues with the original medical treatment alone. The main goal is to see whether surgery improves the two-year progression-free survival rate, with secondary goals including overall survival and the rate of complete tumor removal.