The association between miR-504 (but not miR-26a) expression and mutant EGFR was then confirmed in a validated cohort of 105 lung adenocarcinoma tissue samples from The Cancer Genome Atlas: a high level of miR-504 expression was associated with EGFR mutations (odds ratio = 2.86; 95% CI 1.07–7.71; p = 0.04). The gene discussed is EGFR; the disease is lung adenocarcinoma.