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Also known as: ERBB2; c-erbB-2; HER2 Serum
Formal name: HER2/neu Amplification by FISH; HER2 Overexpression by IHC; HER2 Quantitative, Serum

At a Glance

Why Get Tested?

To determine whether a breast cancer tumor is positive for HER2/neu, which helps to guide treatment and predict the course of the disease (prognosis); sometimes to monitor treatment and for cancer recurrence

When to Get Tested?

When you have been diagnosed with invasive breast cancer

Sample Required?

A sample of breast cancer tissue obtained during a biopsy or a tumor removed surgically during a lumpectomy or mastectomy; sometimes a blood sample drawn from a vein in your arm

Test Preparation Needed?