Table 3.

RAS mutation by exon/codon: frequency and prevalence

RAS mutation	Tissue		Plasma
	N	%	N	%
KRAS Exon 2 Codon 12	40	77	35	70
KRAS Exon 2 Codon 13	10	19	10	20
KRAS Exon 3 Codon 61	1	2	1	2
NRAS Exon 3 Codon 61	1	2	3	6
KRAS Exon 4 Codon 146	1	2	1	2
RAS prevalence	52/98 = 53.1%		50/98 = 51.0%
WT prevalence	46/98 = 46.9%		48/98 = 49.0%