Among them, Galectin-1 (Gal-1), Gal-3, and Gal-9 have been associated with multiple leukemia subtypes, such as acute myeloid leukemia (AML), acute promyelocytic leukemia (APL), B-cell precursor acute lymphoblastic leukemia (BCP-ALL), adult T-cell leukemia (ATL), and chronic lymphocytic leukemia (CLL). Here, LGALS9 is linked to B-cell chronic lymphocytic leukemia.