This study is testing a new treatment called **SAIL66** for patients with certain types of advanced cancers. The study will look at how safe the treatment is and how well it works. Patients in the study should have **CLDN6-positive tumors**, meaning their cancer cells have a specific protein called CLDN6. The study is for adults (18 or older) who are in good health (ECOG PS of 0 or 1, which means they can carry out daily activities with little to no symptoms). Men in the study need to agree to use birth control. Women who are pregnant or breastfeeding cannot join, and neither can people with certain brain problems or uncontrolled pain.

• The study involves multiple visits, as the treatment and observation will be ongoing.
• There are no specific details on compensation, but participants will be closely monitored.
• Risks may include side effects common with cancer treatments, like fatigue or nausea.