Further, MERTK was expressed in 7/8 (87.5%) xenograft-passaged ETP-ALL patient samples and 5/7 (71.4%) ETP, near-ETP, or ETP/myeloid primary patient samples, but in only 3/6 (50%) non-ETP T-ALL primary patient samples (Figure 1E). The gene discussed is MERTK; the disease is acute lymphoblastic leukemia.