RENATA GONDIM MEIRA VELAME DE AZEVEDO

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Instituto do Câncer do Estado de São Paulo, Hospital das Clínicas, Faculdade de Medicina

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Assunto: Breast neoplasms ×

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  • article 21 Citação(ões) na Scopus
    Clinical impact of adjuvant radiation therapy delay after neoadjuvant chemotherapy in locally advanced breast cancer
    (2018) SILVA, Saulo Brito; PEREIRA, Allan Andresson Lima; MARTA, Gustavo Nader; LIMA, Kennya Medeiros Lopes de Barros; FREITAS, Thiago Brasileiro de; MATUTINO, Adriana Reis Brandao; SOUZA, Manoel Carlos Leonardi de Azevedo; AZEVEDO, Renata Gondim Meira Velame de; VIVEIROS, Pedro Antonio Hermida de; LIMA, Julianne Maria da Silva; FILASSI, Jose Roberto; CARVALHO, Heloisa de Andrade; PIATO, Jose Roberto Morales; MANO, Max S.
    Background: and Purpose: Post-operative radiation therapy (PORT) is usually indicated for patients with breast cancer (BC) after neoadjuvant chemotherapy (NAC) and surgery. However, the optimal timing to initiation of PORT is currently unknown. Material and methods: We retrospectively evaluated data from patients with BC who received PORT after NAC and surgery at our institution from 2008 to 2014. Patients were categorized into three groups according to the time between surgery and PORT: < 8 weeks, 8-16 weeks and > 16 weeks. Results: A total of 581 patients were included; 74% had clinical stage III. Forty-three patients started PORT within 8 weeks, 354 between 8 and 16 weeks and 184 beyond 16 weeks from surgery. With a median follow-up of 32 months, initiation of PORT up to 8 weeks after surgery was associated with better disease-free survival (DFS) (< 8 weeks versus 8-16 weeks: HR 0.33; 95% CI 0.13-0.81; p = 0.02; < 8 weeks versus > 16 weeks: HR 0.38; 95% CI 0.15-0.96; p = 0.04) and better overall survival (OS) (< 8 weeks versus 8-16 weeks: HR 0.22; 95% CI 0.05-0.90; p = 0.036; < 8 weeks versus > 16 weeks: HR 0.28; 95% CI 0.07-1.15; p = 0.08). Conclusion: PORT started up to 8 weeks after surgery was associated with better DFS and OS in locally-advanced BC patients submitted to NAC. Our findings suggest that early initiation of PORT is critically important for these patients. However, the low numbers of patients and events in this study prevent us from drawing firm conclusions.