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Article

Expression of keratin 20 and its clinicopathological significance in intrahepatic cholangiocarcinoma

  • Authors:
    • Ji Eun Choi
    • Sang Jae Noh
    • Ju Hyung Lee
    • Jun Sang Bae
    • Hyun Hee Chu
    • Ho Sung Park
    • Kyu Yun Jang
    • Myoung Ja Chung
    • Myoung Jae Kang
    • Dong Geun Lee
    • Woo Sung Moon
  • View Affiliations / Copyright

    Affiliations: Department of Pathology, Chonbuk National University, Medical School and Research Institute for Endocrine Sciences, Jeonju, Jeonbuk 561-756, Republic of Korea, Department of Preventive Medicine, Chonbuk National University, Medical School and Research Institute for Endocrine Sciences, Jeonju, Jeonbuk 561-756, Republic of Korea
  • Pages: 534-540
    |
    Published online on: June 13, 2012
       https://doi.org/10.3892/ol.2012.756
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Abstract

Although the expression of keratin 7 (K7) and K20 is considered to be a useful factor in the differential diagnosis of intrahepatic cholangiocarcinoma (ICC) and metastatic colorectal carcinoma (CRC) of the liver, a proportion of typical ICC retains K20 expression. The frequency and biological significance of K20 expression in ICC remains unclear. We analyzed the expression of K7, K19 and K20 in 66 surgically resected liver tumors consisting of 46 ICCs and 20 metastatic CRCs of the liver and 20 corresponding primary CRCs. In the 46 ICCs, K7, K19 and K20 were expressed in 40 (87%), 45 (98%) and 16 (35%) cases, respectively. K7, K19 and K20 were expressed in 1 (5%), 20 (100%) and 16 (80%) of the 20 primary CRCs and 2 (10%), 20 (100%) and 16 (80%) of the 20 metastatic CRCs, respectively. A combined K7/K20 profile was identified as a good predictor for differentiating ICC and metastatic CRC. K20 expression in ICC was significantly associated with male gender (P=0.034), hilar location (P=0.026), intraductal papillary type (P=0.006), intestinal phenotype (P<0.001) and MUC2 expression (P=0.008). Univariate analysis identified that poor patient survival was significantly associated with histological grade (P=0.020), invasion depth (P=0.005), lymph node metastasis (P=0.012), tumor stage (P=0.004) and vessel invasion (P=0.023). The tumor stage (P=0.002) was a poor independent prognostic indicator, while MUC6 expression (P=0.036) was a good independent prognostic indicator. The survival rate in patients with K20‑positive ICC was lower compared to that of patients with K20‑negative ICC, but was not statistically significant. Furthermore, the combined K7/K20 immunophenotype was identified to be useful for differentiating ICC and metastatic CRC. K20‑positive ICC displays specific characteristics with regards to tumor location and histological subtype. Additionally, MUC6 expression in ICC is a good independent prognostic factor, while K20 expression is more often associated with aggressive biological behavior.
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Copy and paste a formatted citation
Spandidos Publications style
Choi JE, Noh SJ, Lee JH, Bae JS, Chu HH, Park HS, Jang KY, Chung MJ, Kang MJ, Lee DG, Lee DG, et al: Expression of keratin 20 and its clinicopathological significance in intrahepatic cholangiocarcinoma. Oncol Lett 4: 534-540, 2012.
APA
Choi, J.E., Noh, S.J., Lee, J.H., Bae, J.S., Chu, H.H., Park, H.S. ... Moon, W.S. (2012). Expression of keratin 20 and its clinicopathological significance in intrahepatic cholangiocarcinoma. Oncology Letters, 4, 534-540. https://doi.org/10.3892/ol.2012.756
MLA
Choi, J. E., Noh, S. J., Lee, J. H., Bae, J. S., Chu, H. H., Park, H. S., Jang, K. Y., Chung, M. J., Kang, M. J., Lee, D. G., Moon, W. S."Expression of keratin 20 and its clinicopathological significance in intrahepatic cholangiocarcinoma". Oncology Letters 4.3 (2012): 534-540.
Chicago
Choi, J. E., Noh, S. J., Lee, J. H., Bae, J. S., Chu, H. H., Park, H. S., Jang, K. Y., Chung, M. J., Kang, M. J., Lee, D. G., Moon, W. S."Expression of keratin 20 and its clinicopathological significance in intrahepatic cholangiocarcinoma". Oncology Letters 4, no. 3 (2012): 534-540. https://doi.org/10.3892/ol.2012.756
Copy and paste a formatted citation
x
Spandidos Publications style
Choi JE, Noh SJ, Lee JH, Bae JS, Chu HH, Park HS, Jang KY, Chung MJ, Kang MJ, Lee DG, Lee DG, et al: Expression of keratin 20 and its clinicopathological significance in intrahepatic cholangiocarcinoma. Oncol Lett 4: 534-540, 2012.
APA
Choi, J.E., Noh, S.J., Lee, J.H., Bae, J.S., Chu, H.H., Park, H.S. ... Moon, W.S. (2012). Expression of keratin 20 and its clinicopathological significance in intrahepatic cholangiocarcinoma. Oncology Letters, 4, 534-540. https://doi.org/10.3892/ol.2012.756
MLA
Choi, J. E., Noh, S. J., Lee, J. H., Bae, J. S., Chu, H. H., Park, H. S., Jang, K. Y., Chung, M. J., Kang, M. J., Lee, D. G., Moon, W. S."Expression of keratin 20 and its clinicopathological significance in intrahepatic cholangiocarcinoma". Oncology Letters 4.3 (2012): 534-540.
Chicago
Choi, J. E., Noh, S. J., Lee, J. H., Bae, J. S., Chu, H. H., Park, H. S., Jang, K. Y., Chung, M. J., Kang, M. J., Lee, D. G., Moon, W. S."Expression of keratin 20 and its clinicopathological significance in intrahepatic cholangiocarcinoma". Oncology Letters 4, no. 3 (2012): 534-540. https://doi.org/10.3892/ol.2012.756
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