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Central nervous system relapse in triple-negative breast cancer patients achieving pathological complete response
Gabriel Berlingieri Polho1, Yumi Ricucci Shinkado1, Leticia Kimie Murazawa1
1Instituto do Câncer do Estado de São Paulo, Brazil, Av. Dr. Arnaldo, 251 - Cerqueira Cesar, São Paulo, SP, Brazil.
Abstract:
Triple-negative breast cancer (TNBC) is associated with an increased risk of distant metastases. While pathological complete response (pCR) after neoadjuvant chemotherapy predicts favorable outcomes, data suggest it may not uniformly protect against central nervous system (CNS) relapse. This study analyzed 774 TNBC patients to assess recurrence patterns. While CNS recurrences were numerically lower in pCR patients (5.0 % vs 8.8 %, p = 0.11), they represented a significantly higher proportion of all relapses in this group (50.0 % vs 20.2 %, p = 0.003). These results suggest that while pCR reduces overall recurrence risk, there is a distinct pattern of CNS-predominant failure.
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