EGFR and neoplasm: Of the 157 patients, 79 were tested for EGFR in tumor and cfDNA samples; 5 (6%) patients had EGFR mutations in the FFPE tumor samples and 6 (8%) had EGFR mutations in cfDNA from plasma, with overall agreement between testing in 78 (99%) cases (kappa = 1.00, SE 0.10, 95% CI 0.71–1.00) with sensitivity 100% (95% CI 0.48–1.00), specificity 99% (95% CI 0.93–1.00), positive predictive value 83% (95% CI 0.36–0.97) and negative predictive value 100% (95% CI 0.95–1.00; Table 1).