EGFR and adenocarcinoma: The cytological samples of the present study obtained via FNA, were found to carry both mutations EGFR c.2573T>G and c.2369C>T (L858R/T790M), demonstrating the advantage of the FNA procedure and the ability of performing serial sampling of a given tumor to assess the efficacy of targeted therapy or identify genetic shifts of adenocarcinoma with EGFR mutations (3).