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Health Topicscancerbreast cancerWhat does it mean to be HER2 positive vs. HER2 negative?

What does it mean to be HER2 positive vs. HER2 negative?

Written by Jameson Kowalczyk. Medically reviewed in December 2024 by Amy Gonzales, MD.

Updated on October 25, 2024

The difference between HER2-positive and HER2-negative breast cancer is related to the amount of a certain protein. Watch this video to learn how this affects treatment.

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