The expression of TCL1 has been described in germinal center (GC) centroblast, centrocyte and post-GC memory B cells, in tumors arising from the germinal center such as follicular lymphoma (FL), Burkitt lymphoma (BL), diffuse large B cell lymphoma (DLBCL) and from memory cells such as chronic lymphocytic leukemia (CLL) (4, 8). The gene discussed is TCL1A; the disease is B-cell chronic lymphocytic leukemia.