EGFR and adenocarcinoma: For RFS, high CD73 expression (HR, 2.27; 95% CI, 1.47–3.51) was an independent unfavorable prognostic marker, after adjusting for age, sex, smoking status, stage, adjuvant chemotherapy, mutant EGFR expression, TTF-1 expression, and adenocarcinoma subtypes (Table 2).