Abstract
Breast cancer is a public health problem due to its high frequency. The cancerisation process is characterized in part by the dysfunction of cellular communication pathway, like on one implicating Her-2. Her-2 is overexpressed by 30% in breast cancer and is associated with poor prognosis, with a decrease overall survival and a shortening time to disease progression. The Her-2/neu oncogene is involved in the development of breast cancer by amplification and/or overexpression of its product, the Her-2 protein that takes a considerable importance as a potential therapeutic target with specific antitumoral therapies. Besides, more and more studies demonstrated the relevance of Her-2 serum level as a predictive marker in the setting of metastatic breast cancer overexpressing Her-2.
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