This study is testing a new experimental drug called linvoseltamab for adults with multiple myeloma, a type of blood cancer. Multiple myeloma is when cancer cells grow in the bone marrow, which can make people very sick. Linvoseltamab has already shown promise when used alone in past studies, but this is the first time it's being tested with other treatments to see if they work better together.

The main goal is to find out if linvoseltamab is safe to use with other cancer drugs and to determine the right dose. Researchers also want to see how well the drug works, if it causes any side effects, and how it acts in the body.

• The study involves taking the drug with other treatments, which may have side effects.
• Participants need to have previously tried other cancer treatments.
• Doctors will closely monitor patients' health throughout the study.