Asian Pacific Journal of Cancer Prevention

  • 제14권7호
  • /
  • Pages.4353-4358
  • /
  • 2013
  • /
  • 1513-7368(pISSN)
  • /
  • 2476-762X(eISSN)
아시아태평양암예방학회 (Asian Pacific Journal of Cancer Prevention)
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Ki67 Index in Breast Cancer: Correlation with Other Prognostic Markers and Potential in Pakistani Patients

  • Haroon, Saroona (Department of Pathology and Microbiology, Aga Khan University Hospital) ;
  • Hashmi, Atif Ali (Department of Histopathology, Liaquat National Hospital and Medical College) ;
  • Khurshid, Amna (Department of Histopathology, Liaquat National Hospital and Medical College) ;
  • Kanpurwala, Muhammad Adnan (Department of Physiology, Muhammad Bin Qasim Medical and Dental College) ;
  • Mujtuba, Shafaq (Department of Histopathology, Liaquat National Hospital and Medical College) ;
  • Malik, Babar (Department of Medical Oncology, Sindh Institute of Urology and Transplantation) ;
  • Faridi, Naveen (Department of Histopathology, Liaquat National Hospital and Medical College)
  • 발행 : 2013.07.30
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Introduction: Breast cancer aggressiveness can be correlated with proliferation status of tumor cells, which can be ascertained with tumor grade and Ki67 indexing. However due to lack of reproducibility, the ASCO do not recommend routine use of Ki67 in determining prognosis in newly diagnosed breast cancers. We therefore aimed to determine associations of the Ki67 index with other prognostic markers like tumor size, grade, lymph node metastasis, ER, PR and HER2neu status. Methods: A total of 194 cases of newly diagnosed breast cancer were included in the study. Immunohistochemical staining for ER, PR, HER2neu and Ki67 was performed by the DAKO envision method. Associations of the Ki67 index with other prognostic factors were evaluated both as continuous and categorical variables. Results: Mean age of the patients was 51.7 years (24-90). Mean Ki67 index was 26.9% (1-90). ER, PR, HER2neu positivity was noted in 90/194 cases (46.4%), 74/194 cases (38.1%) and 110/194 cases (56.70%) respectively. Significant association was found between Ki67 and tumor grade, PR, HER2neu positivity and lymph node status, but no link was apparent with ER positivity and tumor size. There wasan inverse relation between Ki67 index and PR positivity, whereas a direct correlation was seen with HER2neu positivity. However, high Ki67 (>30%) was associated with decreased HER2neu positivity as compared to intermediate Ki67 (16-30%). The same trend was established with lymph node metastasis. Conclusion: Our study indicates that with high grade tumors, clinical utility of ki67 is greater in combination with other prognostic markers because we found that tumors with Ki67 higher than 30% have better prognostic profile compared to tumors with intermediate Ki67 level, as reflected by slightly lower frequency of lymph node metastasis and HER2neu expression. Therefore we suggest that Ki67 index should be categorized into high, intermediate and low groups when considering adjuvant chemotherapy and prognostic stratification.

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참고문헌

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