EGFR and neoplasm: Of the remaining n = 7 subjects, we identified a patient with a p.G719X EGFR mutation present in both PFPE and FFPE tumour blocks and Temno tumour biopsies (and absent in the parenchyma block) and another subject harbouring two separate EGFR mutations (p.L858R and p.S768I) present in the block‐sized tumour samples and Temno biopsies and absent in the background lung parenchyma (Figure 3E).