EGFR mutation targeted therapy explained

A mutation is a change in genetic instructions. In some cancers, an EGFR change keeps growth signals switched on. A targeted medicine is selected to interfere with that signal. The result is a treatment clue, not a complete description of the cancer.

The same type of molecular testing can be relevant across several cancers, but the meaning depends on the tumour’s origin, stage and other findings. Your clinician may use tissue or blood testing and may repeat testing later if the cancer changes.

Ask for a copy of the molecular report and have the team explain the exact EGFR alteration, the proposed medicine and the goal of treatment. Discuss how tablets should be taken, what to do after a missed dose and which medicines may interact.

Skin changes, diarrhoea, mouth irritation, tiredness and nail changes can occur with some EGFR medicines. Keep a symptom record and report problems early. Treatment decisions may also involve surgery, radiotherapy or another systemic medicine.

Call promptly for severe diarrhoea, dehydration, a spreading or painful rash, eye pain or vision changes, fever, or new breathing difficulty. Get emergency help for severe breathlessness, chest pain, confusion, seizure or sudden weakness.

Ask: What exact mutation was found? Why does this medicine fit my cancer? How will response be checked? Which side effects require urgent advice? What alternatives are available if the tumour develops resistance?