Does HER2-targeted therapy treat HER2-positive breast cancer?

HER2-positive breast cancer has an increased amount of the HER2 protein or signal on its cells. Targeted medicines attach to or interfere with this pathway, helping limit growth signals and mark some cancer cells for immune attack. The treatment is matched to the tumour's biology, so a pathology report is central to the decision.

The therapy may be offered before surgery, after surgery, or when disease has spread, depending on the clinical situation. It can be paired with chemotherapy, surgery, radiation, or hormone treatment. The choice of medicine and sequence is individual, and treatment may change if scans, examinations, or side effects call for a different approach.

Ask your team to explain your HER2 test, the purpose of treatment at your stage of care, and how benefit will be assessed. Share any history of heart problems, lung symptoms, allergies, pregnancy plans, or previous cancer medicines. Keep a record of infusions, tablets, symptoms, and appointments. Do not alter or skip treatment without speaking with the oncology team.

Get urgent help for chest pain, severe breathlessness, fainting, or swelling of the face or throat. Contact the treatment team promptly for a new persistent cough, ankle swelling, racing heartbeat, fever, or sudden worsening weakness. These symptoms do not by themselves show that treatment is failing, but they can signal a reaction or a need to check heart, lung, or infection-related problems.

Ask which HER2-targeted medicine is recommended, how it will be administered, and what monitoring is needed before and during treatment. Clarify how it will work alongside other therapies, what side effects merit a same-day call, and how the team will judge whether the plan is helping.