Is there anything else I need to know about HER2 breast cancer testing?While it's much more common in women, breast cancer, including HER2-positive breast cancer, can also affect men. If a man has been diagnosed with breast cancer, HER2 testing may be recommended.In addition, both men and women may need HER2 testing if they have been diagnosed with certain cancers of the stomach and esophagus. These cancers sometimes have high levels of the HER2 protein and may respond well to HER2-positive cancer treatments.
