Concurrent use of capecitabine with radiation therapy and survival in breast cancer (BC) after neoadjuvant chemotherapy

• Autores: Y. L. Liu, C. Chin, B. Catanese, S. M. Lee, S. Zhan, Kevin M. Kalinsky, E. Connolly
• Localización: Clinical & translational oncology, ISSN 1699-048X, Vol. 20, Nº. 10 (October 2018), 2018, págs. 1280-1288
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • Purpose Capecitabine has been studied as a radiosensitizer, and our study seeks to examine the association of concurrent capecitabine/radiation therapy (RT) on event-free- (EFS) and overall survival (OS) in women with breast cancer (BC) with residual disease after neoadjuvant chemotherapy (NAC).

    Methods/patients In a retrospective study of women with BC who received adriamycin/taxane-based NAC from 2004–2016, we identified 21 women administered concurrent capecitabine/RT. To assess differences in survival, we selected a clinical control cohort (n = 57) based on criteria used to select patients for capecitabine/RT. We also created a matched cohort (2:1), matching on tumor subtype, pathological stage and age (< 50 or 50+ years). Differences in EFS, using STEEP criteria, and OS, using all-cause mortality, between those who received capecitabine/RT and controls were assessed.

    Results Of the 21 women who received capecitabine/RT, median age was 52 years. The majority were pathologic stage III (n = 15) and hormone receptor-positive/HER2-negative BC (n = 20). In those receiving capecitabine/RT, there were 9 events, compared with 14 events in clinical and 10 events in matched controls. Capecitabine/RT was associated with worse OS in clinical (HR 3.83 95% CI 1.12–13.11, p = 0.03) and matched controls (HR 3.71 95% CI 1.04–13.18, p = 0.04), after adjusting for clinical size, pathological stage and lymphovascular invasion. Capecitabine/RT was also associated with a trend towards worse EFS in clinical (HR 2.41 95% CI 0.86–6.74, p = 0.09) and matched controls (HR 2.68 95% CI 0.91–7.90, p = 0.07) after adjustment.

    Conclusion Concurrent capecitabine/RT after NAC is associated with worse survival and should be carefully considered in BC.