EGFR and neoplasm: Even though the statistically significant correlations were seen in KRAS-FFPE, BRAF-FFPE, EGFR-FNA, and KRAS-FNA samples, with the highest R2 value 0.238 found in EGFR FNA specimens (Figure 2A), these data suggest that in the best-case scenario, only 23.8% of EGFR VAF samples may be correlated with tumor cellularity.