Table 1.

Comparison of ctDNA NGS and tissue biopsies NGS (N = 39)

		Tissue biopsy NGS
Tissue biopsy Liquid biopsy		Negative	Positive	Concordance
ctDNA NGS	Negative	10†	5‡	84.62%††
	Positive	1§	23¶

^† Including two stage I–II cases and 8 stage III–IV cases.

^‡ Including two stage I–II cases and 3 stage III–IV cases.

^§ Stage III–IV patients.

^¶ Including one stage I–II cases and 22 stage III–IV cases.

^†† The concordance was 88.24% for late stage (stage III–IV) patients.