Neoadjuvant chemotherapy in hormone receptor-positive/HER2-negative early breast cancer: When, why and what? 2021

Rosalba Torrisi, and Emilia Marrazzo, and Elisa Agostinetto, and Rita De Sanctis, and Agnese Losurdo, and Giovanna Masci, and Corrado Tinterri, and Armando Santoro
IRCCS Humanitas Research Hospital, Dept of Medical Oncology and Hematology Unit, via Manzoni 56, Rozzano, Milan, 20089, Italy. Electronic address: rosalba.torrisi@humanitas.it.

Indication for neoadjuvant chemotherapy (NACT) in HR+/HER2-negative tumors is controversial. Pathological complete response (pCR) rates range from 0 to 18 % while breast-conserving surgery (BCS) is achievable in up to 60 % of tumors. No pathological feature definitely predicts pCR; lobular and molecular luminal A tumors are less likely to achieve pCR although experiencing better outcomes. Luminal B subtype, high proliferation, lack of progesterone receptor, high tumor-infiltrating lymphocytes are positively associated with increased pCR rates but worse outcomes and the prognostic role of pCR is inconsistent across studies. Molecular intrinsic subtyping and genomic signatures appear as more accurate predictors of benefit from NACT, but larger studies are needed. Anthracycline and taxane-based chemotherapy remains the standard NACT; however, CDK 4/6 inhibitors and immune checkpoint inhibitors are under evaluation. In conclusion, NACT may be proposed for luminal tumors requiring downsizing for BCS after multidisciplinary evaluation, provided that other contraindications to BCS are excluded.

UI MeSH Term Description Entries
D011980 Receptors, Progesterone Specific proteins found in or on cells of progesterone target tissues that specifically combine with progesterone. The cytosol progesterone-receptor complex then associates with the nucleic acids to initiate protein synthesis. There are two kinds of progesterone receptors, A and B. Both are induced by estrogen and have short half-lives. Progesterone Receptors,Progestin Receptor,Progestin Receptors,Receptor, Progesterone,Receptors, Progestin,Progesterone Receptor,Receptor, Progestin
D001943 Breast Neoplasms Tumors or cancer of the human BREAST. Breast Cancer,Breast Tumors,Cancer of Breast,Breast Carcinoma,Cancer of the Breast,Human Mammary Carcinoma,Malignant Neoplasm of Breast,Malignant Tumor of Breast,Mammary Cancer,Mammary Carcinoma, Human,Mammary Neoplasm, Human,Mammary Neoplasms, Human,Neoplasms, Breast,Tumors, Breast,Breast Carcinomas,Breast Malignant Neoplasm,Breast Malignant Neoplasms,Breast Malignant Tumor,Breast Malignant Tumors,Breast Neoplasm,Breast Tumor,Cancer, Breast,Cancer, Mammary,Cancers, Mammary,Carcinoma, Breast,Carcinoma, Human Mammary,Carcinomas, Breast,Carcinomas, Human Mammary,Human Mammary Carcinomas,Human Mammary Neoplasm,Human Mammary Neoplasms,Mammary Cancers,Mammary Carcinomas, Human,Neoplasm, Breast,Neoplasm, Human Mammary,Neoplasms, Human Mammary,Tumor, Breast
D006728 Hormones Chemical substances having a specific regulatory effect on the activity of a certain organ or organs. The term was originally applied to substances secreted by various ENDOCRINE GLANDS and transported in the bloodstream to the target organs. It is sometimes extended to include those substances that are not produced by the endocrine glands but that have similar effects. Hormone,Hormone Receptor Agonists,Agonists, Hormone Receptor,Receptor Agonists, Hormone
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000971 Antineoplastic Combined Chemotherapy Protocols The use of two or more chemicals simultaneously or sequentially in the drug therapy of neoplasms. The drugs need not be in the same dosage form. Anticancer Drug Combinations,Antineoplastic Agents, Combined,Antineoplastic Chemotherapy Protocols,Antineoplastic Drug Combinations,Cancer Chemotherapy Protocols,Chemotherapy Protocols, Antineoplastic,Drug Combinations, Antineoplastic,Antineoplastic Combined Chemotherapy Regimens,Combined Antineoplastic Agents,Agent, Combined Antineoplastic,Agents, Combined Antineoplastic,Anticancer Drug Combination,Antineoplastic Agent, Combined,Antineoplastic Chemotherapy Protocol,Antineoplastic Drug Combination,Cancer Chemotherapy Protocol,Chemotherapy Protocol, Antineoplastic,Chemotherapy Protocol, Cancer,Chemotherapy Protocols, Cancer,Combinations, Antineoplastic Drug,Combined Antineoplastic Agent,Drug Combination, Anticancer,Drug Combination, Antineoplastic,Drug Combinations, Anticancer,Protocol, Antineoplastic Chemotherapy,Protocol, Cancer Chemotherapy,Protocols, Antineoplastic Chemotherapy,Protocols, Cancer Chemotherapy
D015412 Mastectomy, Segmental Removal of only enough breast tissue to ensure that the margins of the resected surgical specimen are free of tumor. Breast-Conserving Surgery,Lumpectomy,Partial Mastectomy,Breast Conservation Therapy,Breast Quadrantectomy,Breast-Sparing Surgery,Limited Resection Mastectomy,Local Excision Mastectomy,Segmentectomy,Surgery, Breast-Conserving,Breast Conservation Therapies,Breast Conserving Surgery,Breast Quadrantectomies,Breast Sparing Surgery,Breast-Conserving Surgeries,Breast-Sparing Surgeries,Conservation Therapies, Breast,Conservation Therapy, Breast,Limited Resection Mastectomies,Local Excision Mastectomies,Lumpectomies,Mastectomies, Limited Resection,Mastectomies, Local Excision,Mastectomies, Partial,Mastectomies, Segmental,Mastectomy, Limited Resection,Mastectomy, Local Excision,Mastectomy, Partial,Partial Mastectomies,Quadrantectomies, Breast,Quadrantectomy, Breast,Segmental Mastectomies,Segmental Mastectomy,Segmentectomies,Surgeries, Breast-Conserving,Surgeries, Breast-Sparing,Surgery, Breast Conserving,Surgery, Breast-Sparing
D017024 Chemotherapy, Adjuvant Drug therapy given to augment or stimulate some other form of treatment such as surgery or radiation therapy. Adjuvant chemotherapy is commonly used in the therapy of cancer and can be administered before or after the primary treatment. Adjuvant Chemotherapy,Drug Therapy, Adjuvant,Adjuvant Drug Therapy
D018719 Receptor, ErbB-2 A cell surface protein-tyrosine kinase receptor that is overexpressed in a variety of ADENOCARCINOMAS. It has extensive homology to and heterodimerizes with the EGF RECEPTOR, the ERBB-3 RECEPTOR, and the ERBB-4 RECEPTOR. Activation of the erbB-2 receptor occurs through heterodimer formation with a ligand-bound erbB receptor family member. HER-2 Proto-Oncogene Protein,Proto-Oncogene Protein HER-2,Proto-Oncogene Protein p185(neu),c-erbB-2 Protein,erbB-2 Proto-Oncogene Protein,erbB-2 Receptor Protein-Tyrosine Kinase,neu Proto-Oncogene Protein,Antigens, CD340,CD340 Antigen,Erb-b2 Receptor Tyrosine Kinases,Metastatic Lymph Node Gene 19 Protein,Neu Receptor,Oncogene Protein HER-2,Proto-Oncogene Proteins c-erbB-2,Proto-oncogene Protein Neu,Receptor, Neu,Receptors, erbB-2,Tyrosine Kinase-type Cell Surface Receptor HER2,p185(c-neu),p185erbB2 Protein,CD340 Antigens,Erb b2 Receptor Tyrosine Kinases,ErbB-2 Receptor,HER 2 Proto Oncogene Protein,Oncogene Protein HER 2,Proto Oncogene Protein HER 2,Proto Oncogene Proteins c erbB 2,Proto-Oncogene Protein, HER-2,Proto-Oncogene Protein, erbB-2,Proto-Oncogene Protein, neu,Tyrosine Kinase type Cell Surface Receptor HER2,c erbB 2 Protein,erbB 2 Proto Oncogene Protein,erbB 2 Receptor Protein Tyrosine Kinase,erbB-2 Receptors,neu Proto Oncogene Protein
D020360 Neoadjuvant Therapy Preliminary cancer therapy (chemotherapy, radiation therapy, hormone/endocrine therapy, IMMUNOTHERAPY, HYPERTHERMIA, INDUCED etc.) that is given before the main therapy. Neoadjuvant Chemoradiation,Neoadjuvant Chemoradiation Therapy,Neoadjuvant Chemoradiation Treatment,Neoadjuvant Chemoradiotherapy,Neoadjuvant Chemotherapy,Neoadjuvant Chemotherapy Treatment,Neoadjuvant Radiation,Neoadjuvant Radiation Therapy,Neoadjuvant Radiation Treatment,Neoadjuvant Radiotherapy,Neoadjuvant Systemic Therapy,Neoadjuvant Systemic Treatment,Neoadjuvant Treatment,Chemoradiation Therapy, Neoadjuvant,Chemoradiation Treatment, Neoadjuvant,Chemoradiation, Neoadjuvant,Chemoradiotherapy, Neoadjuvant,Chemotherapy Treatment, Neoadjuvant,Chemotherapy, Neoadjuvant,Neoadjuvant Chemoradiation Therapies,Neoadjuvant Chemoradiation Treatments,Neoadjuvant Chemoradiations,Neoadjuvant Chemoradiotherapies,Neoadjuvant Chemotherapies,Neoadjuvant Chemotherapy Treatments,Neoadjuvant Radiation Therapies,Neoadjuvant Radiation Treatments,Neoadjuvant Radiations,Neoadjuvant Radiotherapies,Neoadjuvant Systemic Therapies,Neoadjuvant Systemic Treatments,Neoadjuvant Therapies,Neoadjuvant Treatments,Radiation Therapy, Neoadjuvant,Radiation Treatment, Neoadjuvant,Radiation, Neoadjuvant,Radiotherapy, Neoadjuvant,Systemic Therapy, Neoadjuvant,Systemic Treatment, Neoadjuvant,Therapy, Neoadjuvant,Therapy, Neoadjuvant Chemoradiation,Therapy, Neoadjuvant Radiation,Therapy, Neoadjuvant Systemic,Treatment, Neoadjuvant,Treatment, Neoadjuvant Chemoradiation,Treatment, Neoadjuvant Chemotherapy,Treatment, Neoadjuvant Radiation,Treatment, Neoadjuvant Systemic

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