HER2-positive breast cancer: What is it?

Q.	A friend of mine has something called HER2-positive breast cancer. Can you tell me what this means? Terry / Arizona see response Mayo Clinic breast-health specialist Sandhya Pruthi, M.D., and colleagues answer select questions from readers.

All Breast Cancer Q&As:

• Abortion and breast cancer: Is there a link?
• Breast calcifications: Are they breast cancer?
• Breast cancer treatment: Do I need chemotherapy?
• Breast implants: Do they interfere with mammograms?
• Breast rash: Could it be inflammatory breast cancer?



• Breast thermography: Can it detect breast cancer?
• Chemotherapy side effects: A cause of heart disease?
• Early menarche: A risk factor for cancer?
• Fibrocystic breast disease: Any link to cancer?
• HER2-positive breast cancer: What is it?



• Inflammatory breast cancer: Why is treatment so challenging?
• Mammogram: Can it find cancer in dense breasts?
• Progesterone for hot flashes: Safe after breast cancer?
• Sunscreen use: Does it increase breast cancer risk?

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