Elevated ABCG2 levels have been observed in various hematological malignancies (e.g., acute lymphoblastic leukemia (ALL) and chronic myeloid leukemia (CML)) and solid cancers (e.g., non-small cell lung cancer (NSCLC), ovarian and breast cancer) [75]. The gene discussed is ABCG2; the disease is chronic myelogenous leukemia, BCR-ABL1 positive.