Biomarker-Guided Cancer Therapy: Choosing the Right Treatment for the Right Patient

Cancer treatment is becoming more personalised as doctors learn more about the biology of each tumour. Instead of giving the same chemotherapy to every patient, oncologists now use biomarkers - measurable signals found in blood or tumour tissue - to guide treatment decisions. These markers help identify which medicines are most likely to work for a specific patient and which treatments can be safely avoided.

In common cancers such as breast, lung, and colorectal cancer, biomarkers already play a key role in everyday care. They help doctors decide when to use targeted therapies or immunotherapy and when traditional chemotherapy may not be necessary. This approach can improve treatment effectiveness while reducing side effects.

New blood-based tests are making cancer care even more precise. By detecting tumour-related markers circulating in the bloodstream, doctors can monitor how well treatment is working and spot signs of relapse earlier than before. For patients, biomarker-guided therapy means more informed treatment choices, better tolerance of therapy, and a care plan tailored to their individual cancer.