← Cancer Research Glossary

HER2

A protein that promotes cell growth — overexpressed in some breast and stomach cancers.

What it is

HER2 is a protein that helps control how cells grow and divide. In some cases, this protein is overproduced in certain types of cancer, such as breast and stomach cancer. This overproduction can lead to uncontrolled cell growth.

How it works

When HER2 is overexpressed, it can send signals to cells to grow and divide more quickly than usual. This can lead to the formation of tumors. In a clinical setting, doctors may use tests to detect high levels of HER2 in cancer cells, which can help guide treatment decisions.

Why it matters

Understanding HER2 is important because it can help doctors choose the best treatment for patients with certain types of cancer. Targeted therapies that specifically block the HER2 protein may be effective in treating these cancers. By studying HER2, researchers can also learn more about how cancer develops and how to prevent it.

This information is provided for general education only and is not medical advice. Always consult a qualified healthcare professional for guidance on your health.