Her 2 breast cancer

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Prat A, et al. J Natl Cancer Inst. All patients were treated with neoadjuvant lapatinib Tykerb, Novartis or pertuzumab Perjeta, Genentech in combination with trastuzumab Herceptin, Genentech for 12 to 24 weeks.

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Each healthy breast cell contains two copies of the HER2 gene. This gene is intended to help cells grow normally. If a breast cell has too many copies of the HER2 gene along with too much of the HER2 protein on the cell surface, the cell may grow out of control and become a tumor.

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Genes contain the recipes for the various proteins a cell needs to stay healthy and function normally. Some genes and the proteins they make can influence how a breast cancer behaves and how it might respond to a specific treatment. Cancer cells from a tissue sample can be tested to see which genes are normal and abnormal.

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The following production systems and services will be unavailable during scheduled system maintenance and improvement. Notably, the Focused Update addresses uncommon clinical scenarios and improves clarity, particularly for infrequent HER2 test results that are of uncertain biologic or clinical significance. Updated findings of note include:. Stakeholders are encourage to review and download the following resources to help implement the Focused Update:.

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HER2-enriched disease are more immunogenic than others e. Luminal A or B. However, as more HER2-targeted agents become available, a better understanding of the role played by the immune system in modulating therapy response to different agents will be needed.

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Breast cancer is heterogenous, with variable expression of the estrogen receptor erprogesterone receptor prand human epidermal growth factor receptor 2 her 2. Overexpression of her 2 is generally considered a negative prognostic feature, but whether outcomes for her 2-positive early breast cancer remain different from those for other subtypes in the era of trastuzumab-based adjuvant therapy is unknown. Trastuzumab was underutilized in this cohort.

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These cancer cells have special proteins inside, called hormone receptors. When hormones attach to hormone receptors, the cancer cells with these receptors grow. A pathologist determines the hormone receptor status by testing the tumor tissue removed during a biopsy.

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The job of HER2 is to control a protein on the surface of cells that helps them grow. If the HER2 gene changes, it may help a tumour grow. Healthy cells have 2 copies of the HER2 gene.

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HER2-positive breast cancer is a breast cancer that tests positive for a protein called human epidermal growth factor receptor 2 HER2which promotes the growth of cancer cells. In about 1 of every 5 breast cancers, the cancer cells have a gene mutation that makes an excess of the HER2 protein. HER2-positive breast cancers tend to be more aggressive than other types of breast cancer.

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The most common molecular subset of breast cancer is defined by its ability to respond to the female hormone, estrogen. One in five invasive breast cancers is HER2-positive, making this one of the more common breast cancer subtypes in the United States. When they work normally, HER2 receptors control how a healthy breast cell grows, divides and repairs itself. When they proliferate, the receptors tell the cells to divide and grow rapidly and without control.


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