A Phase III Multi-center Open-label Sponsor-blinded Randomized Study of AZD0901 Monotherapy Compared with Investigator s Choice of Therapy in Second- or Later-Line Adult Participants with Advanced/Metastatic Gastric or Gastroesophageal Junction Adenocarcinoma Expressing Claudin18.2

Brief description of study

This study is designed to test how effective a new treatment called AZD0901 is for patients with advanced stomach cancer or cancer that is at the junction of the stomach and esophagus (GEJ) that shows a specific marker called CLDN18.2. In this study, patients will be divided into three groups. One group will receive AZD0901 and the other group will get a treatment chosen by their doctor from a list of commonly used cancer therapies. Patients will continue with their treatment until it is no longer effective or safe for them.




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