EGFR and squamous cell carcinoma: Among 54 patients with squamous cell carcinoma and available EGFR mutation data, 43 patients were male, 14 were never smokers, and 6 tested positive for EGFR mutations (one double mutation [G719A and S720P] and F723L in exon 18; four typical in-frame deletions in exon 19; and one V786M mutation in exon 20).