Interestingly, the ABCG2 profile showed no significant association with ATP-dependent helicase (ATRX) expression (r = 0.11, p = 0.25) nor with isocitrate dehydrogenase 1 (IDH-1) expression (r = −0.03, p = 0.72), while ABCG2-positive tumor cells showed no significant association with IDH-1 expression (r = 0.04, p = 0.65) but presented an association with ATRX expression (r = 0.19, p = 0.03). The gene discussed is IDH1; the disease is neoplasm.