A Study Evaluating the Safety, Pharmacokinetics, and Activity of Cevostamab in Participants With Relapsed or Refractory Multiple Myeloma

This study is testing a treatment called **cevostamab** for people with a type of blood cancer called **Multiple Myeloma** (MM). The study is looking at how safe the treatment is and how it affects the body. Participants will receive the medicine through a needle in their vein, known as an IV infusion. The study is open-label, which means both the doctors and patients know what treatment is being given.

**Key Points**:

• The study involves regular hospital visits for IV treatments.
• Participants must follow specific rules about avoiding pregnancy during and after the study.
• The study lasts until the researchers gather enough information on cevostamab's effects.

To join, participants must have a good health status and agree to provide samples for testing. They should not have had certain treatments recently, and women must avoid pregnancy during the study. The study will not include people with certain health conditions or those who have received similar treatments before. This study helps doctors understand if cevostamab can be a safe and effective treatment option for people with MM.