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Carbohydrate antigen 242 highly consists with carbohydrate antigen 19-9 in diagnosis and prognosis of colorectal cancer: study on 185 cases

Abstract

The objective of the study was to compare the clinical value of preoperative serum carbohydrate antigen 19-9 (CA19-9) and carbohydrate antigen 242 (CA242) in diagnosis and prognosis for 5-year recurrence-free survival (RFS) in patients with colorectal cancer (CRC). Preoperative serum CA19-9 and CA242 concentrations were detected by C12 protein chip diagnostic system in 185 patients with CRC, and informative data were collected during 5-year follow-up periods. The value of CA19-9 and CA242 in diagnosis and prognosis for 5-year RFS as well as their consistencies and correlations were comparatively analyzed. The sensitivities of CA19-9 and CA242 were only 19.5 and 20%, respectively; the efficiencies of two TMs were 53.9 and 54.2%, respectively; and two TMs increased significantly with advancing clinical stages (P < 0.0001). Preoperative CA19-9 and CA242 levels correlated with stage (r, 0.411 and 0.408) and CEA concentration (r, 0.553 and 0.630). The concentrations of two TMs closely correlated with each other (r = 0.829), and two TMs had a very strong consistency in diagnosis (κ = 0.931). Among 88 of 185 cases with complete follow-up information on RFS, patients with positive preoperative serum CA19-9 or CA242 had higher 5-year recurrent rates (72.2% vs. 44.3%, P = 0.034; 76.5% vs. 43.7%, P = 0.015) and reduced median RFS (14 vs. 36 months, 12 vs. 36 months) compared with those with negative TMs. The consistency of predicting prognosis for RFS of two TMs was extremely strong (κ = 0.964). ROC curves analysis showed that CA242 test performed better than CA19-9 test (AUC, 0.648 vs. 0.605). Univariate analysis showed that preoperative serum status of both TMs was correlated with 5-year RFS (P < 0.05), whereas multivariate Cox regression model analysis revealed that none of them were independent prognostic factors for RFS. Both CA19-9 and CA242 had strong consistencies in diagnosis and prognosis for predicting 5-year RFS. CA242 demonstrated superior value to CA19-9 in CRC.

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Abbreviations

CRC:

Colorectal cancer

CA19-9:

Carbohydrate antigen 19-9

CA242:

Carbohydrate antigen 242

TM:

Tumor marker

RFS:

Recurrence-free survival

C12:

12 Tumor-marker protein chip system

IQR:

Interquartile range

PPV:

Positive predictive value

NPV:

Negative predictive value

CI:

Confidence interval

RR:

Relative risk

ROC:

Receiver operating characteristic

AUC:

Area under curve

TPA:

Tissue polypeptide antigen

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Acknowledgments

Supported by the grants supporting New Strategies to Treat Peritoneal Carcinomatosis from Hubei Sciences and Technology Beureau (2008BCC011, 2060402-542), Jingmen Science and Technology Planning Project (No. 2010S21), the Scholarship Award for Excellent Doctoral Student granted by Ministry of Education (2010), and the Science Fund for Creative Research Groups of the National Natural Science Foundation of China (No. 20621502 and 20921062).

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Correspondence to Yan Li.

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Yang, XQ., Chen, C., Peng, CW. et al. Carbohydrate antigen 242 highly consists with carbohydrate antigen 19-9 in diagnosis and prognosis of colorectal cancer: study on 185 cases. Med Oncol 29, 1030–1036 (2012). https://doi.org/10.1007/s12032-011-9967-z

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  • DOI: https://doi.org/10.1007/s12032-011-9967-z

Keywords

  • Colorectal cancer
  • Carbohydrate antigen 19-9
  • Carbohydrate antigen 242
  • Diagnosis
  • Recurrence-free survival
  • Comparative analysis