Mutation Profile Assessed by Next-Generation Sequencing (NGS) of Circulating Tumor DNA (ctDNA) in Chinese Lung Adenocarcinoma Patients: Analysis of Real-World Data

Table 3

Single mutation of EGFR gene.

EGFR gene mutations	Number of patients	Percentage (%)
Exon-19 del	15	51.72
Exon-21 L858R	10	34.48
Exon-19 ins	1	3.45
Exon-20 ins	1	3.45
Exon-21 L861Q	1	3.45
Gene amplification	1	3.45
Total analyzed	29	100.00

In our cohort, exon-19 (62.16%) was the most common EGFR gene mutation, followed by exon-21 L858R mutation (27.02%).