New DNA Test Could Help Millions of Breast Cancer Patients Avoid Chemotherapy

An international study shows that a new DNA test can identify which breast cancer patients actually need chemotherapy. Millions of patients could safely forgo this intensive treatment in the future. According to scientists, this represents a significant breakthrough in breast cancer treatment.

An international clinical study has delivered promising results: a new DNA test could help determine which breast cancer patients need chemotherapy and which do not. The finding could transform treatment plans for millions of women worldwide.

Until now, many breast cancer patients have undergone chemotherapy as a precaution, even when it may not have been necessary. Chemotherapy is known for its severe side effects – it causes fatigue, nausea, immune system suppression, and other health problems that significantly impact quality of life.

How the test works

The new test analyzes tumour DNA and helps identify whether cancer cells are aggressive enough to warrant chemotherapy. Results from the international study show that a substantial proportion of patients currently receiving chemotherapy could manage equally well without it.

According to scientists, this represents an important step toward personalised medicine, where treatment decisions are increasingly made based on each patient's individual biological markers. The use of more precise tests would mean that chemotherapy reaches those who actually need it, while sparing others from unnecessary side effects.

What this means for patients

If the new DNA test enters broader clinical use, it could fundamentally transform the approach to breast cancer treatment. Experts emphasise that further research is needed before the test becomes a standard part of the diagnostic process, but the results so far are encouraging.