Hairy Cell Leukemia (HCL)

Background: \- Researchers who are studying hairy cell leukemia, and how the disease compares with other disorders, are interested in obtaining additional samples from leukemia patients and healthy volunteers. The investigators are particularly interested in samples from individuals who have diseases that can be treated with a new type of drug called immunotoxin, in which an antibody carrying a toxin binds to a cancer cell and allows the toxin to kill the cell. Objectives: \- To collect a variety of clinical samples, including blood, urine, lymph samples, and other tissues, in order to study the samples and develop new treatments for leukemia. Eligibility: \- Individuals 18 years of age and older who have been diagnosed with leukemia or other kinds of blood and lymphatic system cancers, or who are healthy volunteers. Design: * Individuals who have leukemia will be asked to provide blood, bone marrow, urine, and tumor tissue samples as requested by the researchers. Healthy volunteers will provide only blood and urine samples. * No treatment will be given as part of this protocol.

Adult patients with chronic lymphocytic leukemia (CLL), splenic marginal-zone lymphoma (SMZL) and hairy cell leukemia (HCL) followed at participating clinical sites will be enrolled and undergo sampling of additional amount of blood during the blood draws performed as part of standard clinical care. The project aims to develop and validate innovative patient-derived 3D bioprinted models that faithfully reproduce the key microenvironments of lymphoid tissues, enabling a more physiologically relevant study of mature B-cell malignancies.

This is a national multi-centre, experimental, cross-sectional, non-profit study.

Check whether patients with Hairy Cell Leukemia (HCL) of different status (at diagnosis, in complete remission \> 2 years or relapsed requiring therapy) have a 'signature' of altered immunity based on extracellular vesicles (EV)