Impact of combining the progesterone receptor and preoperative endocrine prognostic index (PEPI) as a prognostic factor after neoadjuvant endocrine therapy using aromatase inhibitors in postmenopausal ER positive and HER2 negative breast cancer

• Sasagu Kurozumi ,

  Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Project administration, Resources, Software, Writing – original draft

  * E-mail: chachagot-a-mail@hotmail.co.jp

  Affiliations Division of Breast Surgery, Saitama Cancer Center, Saitama, Japan, Department of General Surgical Science, Gunma University Graduate School of Medicine, Gunma, Japan

  http://orcid.org/0000-0002-9971-2918

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• Hiroshi Matsumoto,

  Roles Conceptualization, Data curation, Formal analysis, Methodology, Project administration, Resources, Supervision, Writing – review & editing

  Affiliation Division of Breast Surgery, Saitama Cancer Center, Saitama, Japan

  ⨯
• Kenichi Inoue,

  Roles Conceptualization, Data curation, Funding acquisition, Investigation, Methodology, Project administration, Resources, Supervision, Writing – review & editing

  Affiliation Division of Breast Oncology, Saitama Cancer Center, Saitama, Japan

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• Katsunori Tozuka,

  Roles Conceptualization, Data curation, Investigation, Methodology, Project administration, Resources, Supervision, Writing – review & editing

  Affiliation Division of Breast Surgery, Saitama Cancer Center, Saitama, Japan

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• Yuji Hayashi,

  Roles Conceptualization, Investigation, Methodology, Resources, Supervision, Writing – review & editing

  Affiliation Division of Breast Surgery, Saitama Cancer Center, Saitama, Japan

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• Masafumi Kurosumi,

  Roles Conceptualization, Methodology, Project administration, Resources, Supervision, Visualization, Writing – review & editing

  Affiliation Department of Pathology, Saitama Cancer Center, Saitama, Japan

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• Tetsunari Oyama,

  Roles Supervision, Writing – review & editing

  Affiliation Department of Diagnostic Pathology, Gunma University Graduate School of Medicine, Gunma, Japan

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• Takaaki Fujii,

  Roles Supervision, Writing – review & editing

  Affiliation Department of General Surgical Science, Gunma University Graduate School of Medicine, Gunma, Japan

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• Jun Horiguchi,

  Roles Supervision, Writing – review & editing

  Affiliation Department of Breast Surgery, International University of Health and Welfare, Chiba, Japan

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• Hiroyuki Kuwano

  Roles Supervision, Writing – review & editing

  Affiliation Department of General Surgical Science, Gunma University Graduate School of Medicine, Gunma, Japan

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