The positive rate of CK2O mRNA in portal vein blood was 75 9%. The positive cases were significantly correlated with Dukes stage and live metastasis.

• 54例中，41例门静脉血中检出CK20阳性表达，阳性率75.；9%25，CK20阳性检出与Dukes分期、肝转移存在显著性相关，随着Dukes分期的进展CK20阳性率显著增加。