Table 6

Summary of the CEA RT-PCR results on blood samples from colorectal cancer patients undergoing chemotherapy

PatientStageSite of metastasisDays post surgeryCEA RT-PCRSerum levelsaPostsurgical treatment
CEACA19.9CA72-4
26C2−5++5.6 (+)0.4 (−)0.4 (−)CHT-RTb
90+9.0 (+)18.4 (−)1.2 (−)
210+12.5 (+)29.3 (−)1.5 (−)
Lung420+++793.8 (+)2319.0 (+)0.6 (−)Lung metastasis
Lung483+++894.0 (+)1090.0 (+)1.8 (−)
38DMultiple−2+++10.2 (+)2.0 (−)0.1 (−)CHT
36++9.4 (+)0.1 (−)0.1 (−)Stable disease
53++16.2 (+)0.1 (−)1.8 (−)Stable disease
235++51.3 (+)0.1 (−)2.6 (−)Stable disease
319+++82.0 (+)0.8 (−)2.4 (−)PD
530+++573.1 (+)5.3 (−)3.3 (−)PD
31DLiver−1+++311.6 (+)6490.1 (+)1.3 (−)CHT
33224.0 (+)182.9 (+)2.4 (−)
5160.5 (+)462.0 (+)2.6 (−)Responsive
182++226.5 (+)487.1 (+)42.6 (+)PD
37DLiver−1+++13.5 (+)84.6 (+)22.5 (+)CHT
334.3 (−)45.3 (+)8.4 (+)Responsive
514.1 (−)39.5 (+)6.9 (+)Responsive
182++9.5 (+)76.4 (+)18.9 (+)PD
46DLiver−11+++1.0 (−)0.4 (−)0.3 (−)CHT
41++1.4 (−)0.1 (−)1.4 (−)Responsive
56++2.2 (−)0.1 (−)0.4 (−)CR
219+1.1 (−)0.8 (−)2.1 (−)CR
  • a Serum CEA levels were determined by an enzyme immunoassay test kit, using a value of 5 ng/ml as positive. CA19.9 was determined using the CA19.9 kit with the suggested value 37 units/ml as positive. Serum CA72-4 antigen levels were determined using the CA72-4 kit with the suggested value 6 units/ml as positive.

  • b CHT-RT, chemotherapy + radiotherapy; PD, progressive disease; CR, complete remission.