In Asian SqCC patients, incidence of EGFR mutation varies from 2% to 13%.8, 9 According to the updated CAP/IASLC/AMP Molecular Testing guideline, EGFR testing is recommended for adenocarcinomas and mixed lung cancers with an adenocarcinoma component in the setting of lung cancer resection specimens. Here, EGFR is linked to lung carcinoma.