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Prognostic Value of Clinicopathological Factors for Indonesian Breast Carcinomas of Different Molecular Subtypes

Background: Breast carcinoma (BC) is a heterogeneous disease due to its different molecular profiles i.e. luminal (luminal A and luminal B) and non-luminal (HER2 positive and triple negative) subtypes. Prognostic value of clinicopathological factors of Indonesian BC of different molecular subtypes has never been reported previously. This study aims to elaborate prognostic impacts on Indonesian BCs focusing on separate molecular subtypes. Methods: A hundred and fifty cases of invasive BC, stage I-IIIA, in Sardjito Hospital, Indonesia, were stained using anti ER, PR, HER2 and Ki-67 antibodies. Survival and prognostic values were statistically analyzed. Results: Compared to the luminal subtypes, the non-luminal subtypes demonstrated higher proportions of intermediate-to-high grade, stage IIIA, positive lymph node infiltration and mortality. The triple negative subtype was typically intermediate-to-high grade, stage IIIA and with a high relative death risk. Luminal A lesions were characteristically low grade, stage I-II and less likely to cause death. Conclusion: In non-luminal BC, staging and lymph node metastasis are independent prognostic factors for survival in HER2 positive and triple negative subtypes, respectively. In luminal BC, clinicopathological factors demonstrated no influence on survival. This study suggests that staging and lymph node metastasis are correlated with survival in non-luminal Indonesian BCs.

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