What symptoms are experienced will depend upon the organ or part of the body where the cancer is growing.
The most common sites for breast cancer to spread are the brain, bones, lungs, and liver.
Sometimes, the cancer weakens the affected bone, increasing the risk of a break, or fracture.
Verywell / Jessica Olah
The cancer cells that invade healthy tissues can cause those other organs to fail.
Summary
Metastatic HER2-positive breast cancer can cause a variety of symptoms.
These symptoms vary depending on the part of the body being affected.
Breast cancer most commonly spreads to the brain, bones, lungs, or liver.
These symptoms should be evaluated to see if metastatic cancer is the reason youre having them.
However, it is also important to remember that not every symptom will be due to cancer.
American Cancer Society.Breast Cancer HER2 status.
American Cancer Society.Bone metastases.
Icahn School of Medicine at Mount Sinai.Lung metastases.
Icahn School of Medicine at Mount Sinai.Liver metastases.
2019;8(S5):S518-S552.
