BRAF V600E Mutation in Triple-Negative Breast Cancer: A Case Report and Literature Review
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Updated: Oct 12, 2025
Employing Digital Droplet PCR to Detect BRAF V600E Mutations in Formalin-fixed Paraffin-embedded Reference Standard Cell Lines
Published on: October 8, 2015
Liye Wang1, Qianyi Lu1, Kuikui Jiang1
1Department of Oncology, Sun Yat-Sen University Cancer Center, The State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, China.
Background:
The B-Raf proto-oncogene (BRAFV600E) gene mutation has been identified in a variety of malignancies, but no evidence of the efficacy of vemurafenib treatment in BRAFV600E mutant breast cancer (BC) has been reported.
Case Presentation:
We reported a 60-year-old woman with confirmed triple-negative BC with BRAFV600E mutation. Progression-free survival (PFS) for first-line chemotherapy was 7 months. The patient received vemurafenib and albumin-bound paclitaxel as second-line therapy, exhibiting regression of some pulmonary metastatic lesions with concomitant progression of other lesions, and achieved 4.4 months of PFS. Genetic testing of the progressed pulmonary lesion revealed the BRAFV600E mutation, and acquired new mutations and AR amplification. The patient ultimately died of multiple organ failure and achieved 12 months of overall survival.
Conclusions:
The BRAFV600E mutation may be a potential prognostic factor and therapeutic target for BC.
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