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Article

Clinicopathological characteristics and prognostic impact of colorectal cancers with NRAS mutations

  • Authors:
    • Toshiro Ogura
    • Miho Kakuta
    • Toshimasa Yatsuoka
    • Yoji Nishimura
    • Hirohiko Sakamoto
    • Kensei Yamaguchi
    • Minoru Tanabe
    • Yoichi Tanaka
    • Kiwamu Akagi
  • View Affiliations / Copyright

    Affiliations: Division of Gastroenterological Surgery, Saitama Cancer Center, Saitama 362-0806, Japan, Division of Molecular Diagnosis and Cancer Prevention, Saitama Cancer Center, Saitama 362-0806, Japan, Division of Gastroenterology, Saitama Cancer Center, Saitama 362-0806, Japan, Department of Hepato-Biliary-Pancreatic Surgery, Graduate School of Medicine, Tokyo Medical and Dental University, Tokyo 113-8519, Japan
  • Pages: 50-56
    |
    Published online on: May 6, 2014
       https://doi.org/10.3892/or.2014.3165
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Abstract

At present, molecular markers of colorectal cancer (CRC), including KRAS, NRAS and BRAF mutations, and the microsatellite status are evaluated for the development of personalized treatments. However, clinicopathological and molecular characteristics and the prognostic role of NRAS mutations remain unclear. In the present study, a total of 1,304 consecutive stage 0-IV CRC tumor samples were analyzed for KRAS (exon 2, 3 and 4), NRAS (exon 2 and 3) and BRAF (exon 15) mutations. Multivariate analysis was performed to assess the prognostic impact of NRAS mutations. KRAS, NRAS and BRAF mutations were identified in 553 (42.4%), 35 (2.7%), and 59 (4.5%) of 1,304 CRC cases, respectively. Tumors with NRAS mutations were more frequently located in the distal colorectum compared with those with KRAS or BRAF mutations. Multivariate analysis indicated that KRAS and BRAF mutations were found to be associated with poor prognosis [hazard ratio (HR)=1.44, 95% confidence interval (CI), 1.18-1.76 and HR=2.09; 95% CI, 1.33-3.28, respectively], whereas NRAS mutations were associated with a trend toward favorable prognosis (HR=0.53; 95% CI, 0.27-1.03). Characteristics and prognosis of CRC with NRAS mutations are different from those with KRAS or BRAF mutations.
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Copy and paste a formatted citation
Spandidos Publications style
Ogura T, Kakuta M, Yatsuoka T, Nishimura Y, Sakamoto H, Yamaguchi K, Tanabe M, Tanaka Y and Akagi K: Clinicopathological characteristics and prognostic impact of colorectal cancers with NRAS mutations. Oncol Rep 32: 50-56, 2014.
APA
Ogura, T., Kakuta, M., Yatsuoka, T., Nishimura, Y., Sakamoto, H., Yamaguchi, K. ... Akagi, K. (2014). Clinicopathological characteristics and prognostic impact of colorectal cancers with NRAS mutations. Oncology Reports, 32, 50-56. https://doi.org/10.3892/or.2014.3165
MLA
Ogura, T., Kakuta, M., Yatsuoka, T., Nishimura, Y., Sakamoto, H., Yamaguchi, K., Tanabe, M., Tanaka, Y., Akagi, K."Clinicopathological characteristics and prognostic impact of colorectal cancers with NRAS mutations". Oncology Reports 32.1 (2014): 50-56.
Chicago
Ogura, T., Kakuta, M., Yatsuoka, T., Nishimura, Y., Sakamoto, H., Yamaguchi, K., Tanabe, M., Tanaka, Y., Akagi, K."Clinicopathological characteristics and prognostic impact of colorectal cancers with NRAS mutations". Oncology Reports 32, no. 1 (2014): 50-56. https://doi.org/10.3892/or.2014.3165
Copy and paste a formatted citation
x
Spandidos Publications style
Ogura T, Kakuta M, Yatsuoka T, Nishimura Y, Sakamoto H, Yamaguchi K, Tanabe M, Tanaka Y and Akagi K: Clinicopathological characteristics and prognostic impact of colorectal cancers with NRAS mutations. Oncol Rep 32: 50-56, 2014.
APA
Ogura, T., Kakuta, M., Yatsuoka, T., Nishimura, Y., Sakamoto, H., Yamaguchi, K. ... Akagi, K. (2014). Clinicopathological characteristics and prognostic impact of colorectal cancers with NRAS mutations. Oncology Reports, 32, 50-56. https://doi.org/10.3892/or.2014.3165
MLA
Ogura, T., Kakuta, M., Yatsuoka, T., Nishimura, Y., Sakamoto, H., Yamaguchi, K., Tanabe, M., Tanaka, Y., Akagi, K."Clinicopathological characteristics and prognostic impact of colorectal cancers with NRAS mutations". Oncology Reports 32.1 (2014): 50-56.
Chicago
Ogura, T., Kakuta, M., Yatsuoka, T., Nishimura, Y., Sakamoto, H., Yamaguchi, K., Tanabe, M., Tanaka, Y., Akagi, K."Clinicopathological characteristics and prognostic impact of colorectal cancers with NRAS mutations". Oncology Reports 32, no. 1 (2014): 50-56. https://doi.org/10.3892/or.2014.3165
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