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자료유형
학술저널
저자정보
안효정 (인제대학교) 정수진 (인제대학교부속부산백병원) 김태현 (인제대학교) 오민경 (인제대학교) 윤혜경 (인제대학교)
저널정보
한국유방암학회 Journal of Breast Cancer Journal of Breast Cancer Vol.18 No.2
발행연도
2015.1
수록면
149 - 159 (11page)

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Purpose: Human epidermal growth factor receptor 2 (HER2)- positive luminal B type comprises estrogen receptor (ER)-positive and HER2-positive cancers, and HER2-negative luminal B type comprises ER-positive cancers showing a Ki-67 labeling index ≥14% or progesterone receptor (PR) expression of <20% according to the St. Gallen consensus 2013. The current study aimed to classify intrinsic subtypes according to the St. Gallen consensus 2013 and determine the differences in clinicopathological parameters and survival outcomes among the molecular types, especially among the luminal types. Methods: Assessment of molecular types was performed for 267 invasive ductal carcinomas. The differences in clinicopathological parameters, disease- free survival (DFS), and overall survival (OS) among the molecular types were analyzed. Results: The luminal B type was the most prevalent, at 44.9%, followed by the luminal A, triplenegative (including basal-like type), and HER2 type, at 21.7%, 18.7%, and 14.6%, respectively. There were statistically significant differences in size (p=0.003), nodal status (p=0.046), histologic grade (p<0.001), p53 (p<0.001) and cyclooxygenase 2 (COX-2) positivity (p=0.002), recurrence (p=0.001) and death rates (p=0.036), DFS (p=0.002), and OS (p=0.039) among the molecular types. Significant differences in size (p=0.009), nodal metastasis (p=0.019), histologic grade (p<0.001), p53 positivity (p=0.001), and PR expression (p<0.001) were noted between the luminal A and B types. Among the luminal B type cancers, the distributions of ER and PR scores showed significant differences (p=0.003, p=0.003). p53 positivity in the luminal B type cancers was related to shortened DFS (p=0.034). In luminal type cancers, COX-2 positivity was related to longer DFS (p=0.026). Conclusion: Different management guidelines should be considered for the luminal A and luminal B breast cancer types. Positive p53 expression in luminal B type cancers and negative COX- 2 expression in luminal type cancers seem to be related to poor clinical outcome.

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