This study tests a new medicine, **PF-07994525**, to see if it's safe and helps people with advanced cancers, like Multiple Myeloma (MM). **Multiple Myeloma** is a cancer of plasma cells, which are a type of white blood cell that helps fight infections. The study has two parts: Part 1 finds the right dose, and Part 2 checks how well it works and its effects on the body.

**Eligibility:** You can join if you're 18 or older and have tried at least three other MM treatments without success. You need to be healthy enough to participate (determined by your doctor) and must not have certain other medical conditions like active infections or other types of blood cancers.

**Key Points to Consider:**

• **Study Length:** The study has two parts but doesn't specify the total duration.
• **Visits Needed:** Regular visits for monitoring, but details are not specified.
• **Risks:** Possible side effects from treatment, participation requires being in good health.