High expression of miR-155 which was found to be statistically significant as a biomarker for poor prognosis was in adenocarcinoma (P=0.034) with a high expression of miR-155 (MS 69 d, 1 year SR 44.4%) compared to low expression of miR-155 (MS 365 d, 1 year SR 62.5%) and positive EGFR gene mutations (P=0.023) with high expression of miR-155 (MS 58 d, 1 year SR 20.0%) compared to low expression of miR-155 (MS 332 d, 1 year SR 80.0%). The gene discussed is EGFR; the disease is adenocarcinoma.