Metaplastic breast cancer: Prognostic and therapeutic considerations.
J Surg Oncol
; 123(1): 61-70, 2021 Jan.
Article
em En
| MEDLINE
| ID: mdl-33047318
ABSTRACT
INTRODUCTION:
Metaplastic breast cancer (MBC) is a rare condition of breast tumor with different subtypes, considered a disease with worse prognosis; treatments and survival are often unclear and conflicting.METHODS:
We consecutively collected 153 primary MBCs of different subtypes. Breast surgery, neoadjuvant or adjuvant treatment, clinic-pathological factors, number and type of events during follow-up were considered to evaluate overall survival (OS) and invasive disease-free survival (IDFS).RESULTS:
The majority of MBC was triple-negative (TN) subtype (88.7%), G3 (95.3%), pN0 (70.6%), and with high levels of Ki-67 (93.5%). For OS and IDFS, no significant associations were seen between the different MBC subtypes. The matched triple-negative MBC (TNMBC) and ductal TNBC cohorts had similar prognosis both in terms of OS (p = .411) and IDFS (p = .981). We observed a positive trend for TNMBC patients treated in the adjuvant setting with the cyclofosfamide, methotrexate, 5-fluorouracil protocol for better OS (p = .090) and IDFS (p = .087). A poor or absent response rate was observed in the neoadjuvant setting.CONCLUSION:
Our results demonstrate that metaplastic and ductal breast cancers with TN phenotype are similar in terms of overall and disease-free survival. Metaplastic cancers are poorly responsive to neoadjuvant treatment, and in the absence of novel targeted therapies, surgical treatment remains the first choice.Palavras-chave
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Base de dados:
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Assunto principal:
Protocolos de Quimioterapia Combinada Antineoplásica
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Carcinoma Ductal de Mama
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Terapia Neoadjuvante
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Neoplasias de Mama Triplo Negativas
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Mastectomia
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Metaplasia
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Recidiva Local de Neoplasia
Idioma:
En
Ano de publicação:
2021
Tipo de documento:
Article