This clinical trial studies a new treatment for osteosarcoma, a type of bone cancer that comes back or doesn't respond to usual treatments. The trial tests a combination of two drugs: Tegavivint and Gemcitabine. Tegavivint works by blocking certain signals in cancer cells, stopping them from growing. The study aims to find the best dose of these drugs and see if there are any side effects.
- Participants will have regular visits to monitor their health and how well the treatment works.
- The study will check how safe the drug combination is and look for any serious side effects.
- You may need to stop taking some other medications or treatments before joining this study.