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Medical Oncology

, 33:39 | Cite as

BRAF mutation may have different prognostic implications in early- and late-stage colorectal cancer

  • Kuo-Hsing Chen
  • Yu-Lin Lin
  • Jau-Yu Liau
  • Jia-Huei Tsai
  • Li-Hui Tseng
  • Liang-In Lin
  • Jin-Tung Liang
  • Been-Ren Lin
  • Ji-Shiang Hung
  • Yih-Leong Chang
  • Kun-Huei YehEmail author
  • Ann-Lii Cheng
Original Paper

Abstract

The prognostic implication of BRAF mutant colorectal cancer remains paradoxical. Records of BRAF mutant and wild-type colorectal cancer patients at all stages were reviewed. Clinicopathologic features, including microsatellite instability, CpG islands methylator phenotype, and overall survival, of these patients were analyzed. Between 2005 and 2013, 428 colorectal cancer patients were enrolled in this study. The overall survival between BRAF mutant and wild-type patients with early-stage (stages I and II) colorectal cancer differed nonsignificantly (P = 0.99). By contrast, in late-stage (stages III and IV) patients, the median overall survival of BRAF mutant patients (N = 25) was significantly poorer than that of BRAF wild-type (N = 207) patients (BRAF mutant: 21.3 months (95 % confidence interval [CI] 7.1–35.5); BRAF wild-type: 53.5 months (95 % CI 37.5–69.5), P < 0.0001). In early-stage patients, we found that BRAF mutation was significantly associated with CpG island methylator phenotype-positive (P < 0.001), and microsatellite instability-high status (P = 0.0013). Conversely, in late-stage patients, BRAF mutation was significantly associated with CpG island methylator phenotype-positive (P = 0.0015) and the right-side colon (P = 0.014). BRAF mutation may have different prognostic implications in early- and late-stage colorectal cancer.

Keywords

Colorectal cancers BRAF gene mutation Prognosis Microsatellite instability (MSI) CpG island methylator phenotype (CIMP) 

Notes

Acknowledgments

The authors acknowledge statistical assistance provided by the Taiwan Clinical Trial Bioinformatics and Statistical Center, Training Center, and Pharmacogenomics Laboratory, which was founded by the National Research Program for Biopharmaceuticals, at the Ministry of Science and Technology of Taiwan; MOST 103-2325-B-002-033. The authors are grateful for the statistical assistance provided by the Department of Medical Research at National Taiwan University Hospital. This study was supported by grants from the Department of Health, Executive Yuan (DOH100-TD-C-111-001), Taipei, Taiwan.

Compliance of ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

12032_2016_756_MOESM1_ESM.pdf (90 kb)
Supplementary material 1 (PDF 89 kb)

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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  • Kuo-Hsing Chen
    • 1
    • 9
    • 11
  • Yu-Lin Lin
    • 1
    • 11
  • Jau-Yu Liau
    • 2
  • Jia-Huei Tsai
    • 2
  • Li-Hui Tseng
    • 3
  • Liang-In Lin
    • 4
    • 10
  • Jin-Tung Liang
    • 5
    • 6
  • Been-Ren Lin
    • 5
    • 6
  • Ji-Shiang Hung
    • 7
  • Yih-Leong Chang
    • 2
    • 13
  • Kun-Huei Yeh
    • 1
    • 11
    • 12
    Email author
  • Ann-Lii Cheng
    • 1
    • 8
    • 11
  1. 1.Department of OncologyNational Taiwan University HospitalTaipeiTaiwan
  2. 2.Department of PathologyNational Taiwan University HospitalTaipeiTaiwan
  3. 3.Department of Medical GeneticsNational Taiwan University HospitalTaipeiTaiwan
  4. 4.Department of Laboratory MedicineNational Taiwan University HospitalTaipeiTaiwan
  5. 5.Division of Colorectal SurgeryNational Taiwan University HospitalTaipeiTaiwan
  6. 6.Department of SurgeryNational Taiwan University HospitalTaipeiTaiwan
  7. 7.Department of Medical ResearchNational Taiwan University HospitalTaipeiTaiwan
  8. 8.Department of Internal MedicineNational Taiwan University HospitalTaipeiTaiwan
  9. 9.National Taiwan University Cancer CenterTaipeiTaiwan
  10. 10.Department of Clinical Laboratory Sciences and Medical Biotechnology, College of MedicineNational Taiwan UniversityTaipeiTaiwan
  11. 11.Graduate Institute of Oncology, College of MedicineNational Taiwan UniversityTaipeiTaiwan
  12. 12.Graduate Institute of Clinical Medicine, College of MedicineNational Taiwan UniversityTaipeiTaiwan
  13. 13.Department and Graduate Institute of Pathology, College of MedicineNational Taiwan UniversityTaipeiTaiwan

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