Human B-cell malignancies. Selected cell surface, cytoplasmic, and nuclear markers expressed during normal B-cell development that are generally expressed in malignancies. Molecules within parentheses are variable in their expression at the indicated stage of development. ALL indicates acute lymphoblastic leukemia; BL, Burkitt lymphoma; CLL, chronic lymphocytic leukemia; CML-LBC, chronic myelocytic leukemia–lymphoid blast crisis; DLBCL, diffuse large B-cell lymphoma; FL, follicular lymphoma; HCL, hairy cell leukemia; HL, Hodgkin lymphoma; MCL, mantle cell lymphoma; MM, multiple myeloma; MZL, marginal zone lymphoma; PL, plasmablastic lymphoma; SLL, small lymphocytic lymphoma; and WM, Waldenström macroglobulinemia. Illustration by A. Y. Chen.