Due to the very low level of GATA3 expression in B cells that is undetectable by western blot [3] and IHC (Pei unpublished data), we were unable to determine whether Gata3 expression is further reduced in tumor cells of p18−/−;Gata3+/−lymphomas with LOH relative to lymphoma-free B cells. The gene discussed is CDKN2C; the disease is lymphoma.