This research study is testing a new medicine called **BGB-16673** for certain types of blood cancers called **B-cell malignancies**. These include conditions like **Marginal Zone Lymphoma (MZL)**, **Follicular Lymphoma (FL)**, and others. The study has two parts: the first part is to find the right dose (Phase 1), and the second part tests this dose on more people (Phase 2). If you join, you will help test how safe BGB-16673 is and find the best dose.
- You must have a specific type of B-cell cancer and have tried certain treatments before.
- The study will last for several months and requires regular visits for tests and check-ups.
- There may be risks or side effects, so it’s important to talk to your doctor.
Some people cannot join, like those with other cancers or brain involvement. It’s important to discuss your health history with the study team to see if you qualify. This study offers a chance to try a new treatment that could help others in the future.