← 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 means that the cells grow and divide too quickly, leading to the formation of tumors.

How it works

When HER2 is overproduced, it sends a signal to the cell to grow and divide more quickly. This can lead to the formation of tumors and the spread of cancer. In a clinical setting, doctors may use tests to check if a patient's cancer has high levels of HER2, 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. In some cases, treatments that target HER2 can be effective in slowing or stopping the growth of tumors. This can improve patient outcomes and quality of life.

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