Hairy Cell Leukemia: Harnessing the Full Power of Extracellular Vesicles to Improve Patient Care Management

This study is collecting blood and tissue samples from patients with hairy cell leukemia (HCL) — a rare, slow-growing blood cancer — to study tiny particles called extracellular vesicles that cells release into the bloodstream. The goal is to better understand the disease and potentially improve how it is diagnosed and monitored. Healthy volunteers are also being recruited for comparison. **You may be eligible if...** - You are 18 or older - You have been diagnosed with hairy cell leukemia (WHO 2022 criteria) - OR you are a healthy volunteer in generally good health - You are willing to sign an informed consent form **You may NOT be eligible if...** - There are no specific exclusion criteria listed for this study Talk to your doctor to see if this trial is right for you.