ArticleChinese journal of cancer research = Chung-kuo yen cheng yen chiu2025
Factors associated with neoadjuvant therapy insensitivity and its prognostic impact in HER2-positive breast cancer.
Article in Chinese journal of cancer research = Chung-kuo yen cheng yen chiu, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Objective: A subset of patients with human epidermal growth factor receptor 2 positive (HER2+) breast cancer shows insensitivity to neoadjuvant therapy (NAT), often evidenced by imaging results indicating stable disease (SD) or progressive disease (PD), which may reflect intrinsic resistance to treatment. We aimed to investigate the factors associated with NAT insensitivity and its prognostic value in HER2+ breast cancer. Methods: This study included consecutive patients with HER2+ breast cancer who received NAT consisting of chemotherapy combined with anti-HER2 monoclonal antibodies. NAT insensitivity was defined as SD or PD on the basis of treatment response evaluations. Statistical analyses were conducted on the collected clinical data, and HER2 heterogeneity was subsequently assessed. Results: A total of 541 patients were included in the study, among whom 63 (11.6%) were categorized as NAT-insensitive group and 478 (88.4%) as NAT-sensitive group. Hormone receptor (HR) status (P=0.033), HER2 status (P=0.036) and anti-HER2 therapy (P=0.007) were associated with NAT sensitivity. NAT-insensitive group had a significantly shorter event-free survival (EFS) (3-year: 69.4% Conclusions: HR positivity, HER2 2+/fluorescence
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