Table 3. Comparison of EGFR/KRAS/ALK mutations between 30 thoracic biopsy specimens detected by ARMS and matched pleural effusion specimens detected by NGS.

Pleural effusion specimen (NGS)	Thoracic biopsy specimen (ARMS)
	+	−	Total
+	24	2	26
−	2	2	4
Total	26	4	30

+, EGFR/KRAS/ALK positive mutation; −, EGFR/KRAS/ALK negative mutation. NGS, next-generation sequencing.