The Genetic Marksman: Basics of Precision Medicine
Targeted therapy is a "precision" treatment that acts like a sharpshooter. It identifies and attacks specific parts of cancer cells while causing much less damage to healthy cells.
Please remember that every patient is unique; your consultant and medical team are the best judges of the most suitable treatment plan for your specific case.
For a long time, cancer treatments were "one size fits all." Doctors used the same medicines for almost everyone with a certain type of cancer. Today, we have Targeted therapy, often called "Precision medicine."
Scientists have discovered that cancer cells have specific "markers" or genetic changes that make them different from healthy cells. Targeted therapy is designed to find these specific markers and shut them down. It is like having a key that only fits one specific lock, allowing for a much more personalised approach to your recovery.
The "Wanted” poster analogy
To understand how this works, imagine a crowded marketplace where a specific troublemaker is hiding.
Chemotherapy is like a broad police action that affects everyone in the marketplace to ensure the troublemaker is caught. It works, but many innocent people (healthy cells) get caught up in the struggle.
Targeted Therapy is like giving the police a "Wanted” poster with a very detailed photo.
The medicine acts like a sharpshooter or a marksman. It travels through your body, ignoring the "innocent" healthy cells, and only stops when it finds the exact "face" shown on the poster. Because it is so specific, it can stop the cancer from growing with much less "collateral damage" to the rest of your body.
Finding the right target
Before you start this treatment, your doctors will usually take a small sample of the tumour (a biopsy) or a blood test. They are looking for the "target."
Not every cancer has a target that we have a medicine for yet. If your doctor finds a specific genetic marker, they can prescribe a targeted drug that is "made to measure" for your specific type of cancer. This is why two patients with the same type of cancer might receive very different treatments based on their individual biology.
What to expect at the hospital
Targeted therapy is often very convenient for patients. Depending on the drug, it is usually given in one of two ways:
Oral tablets: Many targeted therapies come as capsules or tablets that you can take at home, just like regular medicine.
Infusions: Some are given through an IV drip at the hospital, usually once every few weeks.
Because these drugs are so precise, the side effects are often different from chemotherapy. You might experience skin dryness, changes in your fingernails, or mild fatigue, but these are usually well-managed with the help of your clinical team.
Conclusion
Targeted therapy represents the future of oncology. By focusing on the "genetic signature" of the cancer, we are moving away from general treatments and towards care that is more effective and kinder to your body.
