Table I.

The level of mRNA expression in primary colorectal cancer and liver metastatic cancer.

	Synchronous liver metastasis (n=15)			Metachronous liver metastasis (n=15)
	Primary lesions	Liver metastatic lesions	P-value	Primary lesions	Liver metastatic lesions	P-value
TS	2.92±1.6	2.47±1.32	0.14	3.03±1.6	3.4±2.2	0.23
TP	3.41±3.57	3.61±4.72	0.79	1.61±0.8	2.05±1.41	0.12
DPD	0.23±0.24	0.3±0.29	0.16	0.19±0.12	0.22±0.11	0.15
OPRT	1.14±0.78	0.81±0.45	0.036	0.92±0.28	0.86±0.52	0.34
ERCC1	1.72±0.7	1.45±0.48	0.044	1.5±0.62	1.31±0.65	0.19

The mRNA expression was presented as the mean ± SD.