Table 5. Correlation between KRAS mutation in tissue samples and KRAS overexpression in CTC.

			KRAS overexpression CTC		Total
			Negative	Positive
K-RAS tissue	Wild type	Count	10	10	20
		% within KRAS tissue	50.0%	50.0%	100.0%
		% within KRAS overexpression CTC	47.6%	62.5%	54.1%
		% of total	27.0%	27.0%	25.0%
	Mutated	Count	11	6	17
		% within KRAS tissue	64.7%	35.3%	100.0%
		% within KRAS overexpression CTC	52.4%	37.5%	45.9%
		% of total	29.7%	16.2%	45.9%
Total		Count	21	6	37
		% within KRAS tissue	56.8%	43.2%	100.0%
		% within KRAS overexpression CTC	100.0%	100.0%	100.0%
		% of total	56.8%	43.2%	100.0%