We investigated 30 stage I non-small-cell lung cancer patients harboring EGFR gene mutations with postoperative intrapulmonary recurrence....The median PFS observed in patients who underwent icotinib treatment was significantly longer than in patients who underwent gefitinib treatment (30.5 months vs 12.0 months, p = 0.005). There were no statistical differences in median PFS between patients with tumors harboring exon 21 mutation and exon 19 deletion...