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Background Accurate measurement of tumor burden in breast cancer disease is essential to improve the clinical management of patients. In this study, we evaluate whether the fluctuations in the fraction of PIK3CA mutant allele correlates with tumor response according to RECIST criteria and tumor markers quantification. Methods Eighty six plasma samples were analyzed by digital PCR using Rare Mutation...
PIK3CA gene is frequently mutated in patients with breast cancer and it has been the focus of intense research. Inhibitors of PI3K pathway are being evaluated in ongoing clinical trials but the impact of PIKC3A mutation status on tumor response is yet uncertain. In the metastatic setting, several studies are evaluating the predictive value of PIK3CA mutations. However, results could be biased by biopsy...
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