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. 2020 Jun;9(3):532–540. doi: 10.21037/tlcr.2020.04.01

Table 2. Molecular alterations detected in ctDNA upon progression to osimertinib treatment.

Number of cases Gene Genomic alteration Method
3 EGFR p.C797S dPCR
3 PIK3CA p.E545A NGS, dPCR
1 PIK3CA p.E545K NGS, dPCR
1 EGFR p.A750P NGS, dPCR
1 EGFR p.S464L NGS, dPCR
1 EGFR Amplification NGS

ctDNA, circulating tumor DNA; EGFR, epidermal growth factor receptor; NGS, next-generation sequencing; dPCR, digital PCR.