3[1] Wyld DK,Selby P,Perren TJ,et al.Detection of colorectal cancer cells in peripher al blood by reverse-transcriptase polymerase chain reaction for cytokeratin 20[J].Int J Cancer,1998, 79∶288.
4[2] FunakinO,Tanaka J,Ohshio G,et al.Cytokeratin 20 mRNA in peripheral venous blood of colorectal carcinoma patients[J].Br J Cancer,1998,77∶132.
5[3] Komeda T,fukuda Y.Sensitive detection of circulating hepatocellular cacinoma cells in peripheral venous blood[J].Cancer,1995,75∶2214.
6[4] Burchill SA,Bradbury MF,Pittman K,et al.Detection of epithelial cancer cells in peripheral blood by reverse transcriptase polymerase chain reaction[J].Br J Cancer,1995,71∶278.
8Cosi L, Benhattar J, Costa J, et al, Stability of K- ras mutationsthroughout thenatural history of human colorectal cancer, Eur J Ca -ncer, 1992,28: 1115～1120.
9Hayashi N,Ito I,Yanagisawa A,et al.Genetic diagnosis of lymph-node metastasis in colorectal cancer[].The Lancet.1995
10Satoshi T,Shigetoshi I,Yusuke N,et al.Detection of K-ras mutation in sputum by mutant-allele-specific-amplification ( MASA )[].Human Mutation.1993
