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Molecular Biological Features of Nottingham Histological Grade 3 Breast Cancers

Introduction Cancer biology dominates the behavior and prognosis of a tumor. Although Nottingham histological grade is a subjective pathological determination, it has been accepted as a surrogate model for cancer biology. As such, histologic grade was incorporated into the latest 8th edition of the...

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Bibliographic Details
Published in:Annals of surgical oncology 2020-10, Vol.27 (11), p.4475-4485
Main Authors: Takahashi, Hideo, Oshi, Masanori, Asaoka, Mariko, Yan, Li, Endo, Itaru, Takabe, Kazuaki
Format: Article
Language:English
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Summary:Introduction Cancer biology dominates the behavior and prognosis of a tumor. Although Nottingham histological grade is a subjective pathological determination, it has been accepted as a surrogate model for cancer biology. As such, histologic grade was incorporated into the latest 8th edition of the American Joint Committee on Cancer breast cancer staging system. In this study, we hypothesized that grade 3 breast cancers demonstrate aggressive molecular biological profiles, reflecting worse biology and possible underlying immunogenicity. Methods Transcriptomic and clinical data were obtained from the Molecular Taxonomy of Breast Cancer International Consortium, and the findings were validated by The Cancer Genome Atlas breast cancer cohort and GSE25066. Results Overall, 2876 patients were analyzed in this study. Grade 3 tumors were more common in estrogen receptor (ER)-negative, advanced-stage patients, and were associated with human epidermal growth factor receptor 2 and basal subtypes by the PAM50 classifier, as well as with increased MKI67 expression (all p 
ISSN:1068-9265
1534-4681
DOI:10.1245/s10434-020-08608-1