This study is for adults with advanced solid tumors, which are cancerous growths that have spread. It tests a new drug called dostarlimab, which helps the body fight cancer. The study has two parts: the first part finds a safe dose, and the second part sees how well it works in different cancers. Dostarlimab will be given in different doses to see which works best and is safe. Some people will get a dose every 3 weeks, and others every 6 weeks.

• The study lasts several weeks, with regular visits for treatment and check-ups.
• Participants may receive dostarlimab at different doses to find the best one.
• There may be risks, as the study involves a new drug, but it could help treat cancer.

To join, you must have tried other cancer treatments that didn't work, and meet specific health criteria. People with certain health issues or previous treatments can't participate. This study might help find a new treatment for cancer, but there are potential risks involved. Always discuss with your doctor before joining a study.