Traditional cancer treatments can destroy most of your cancer cells from your body. But there is a chance that some of the cancer cells can stay behind. These remaining cells, or minimal residual disease (MRD), are usually few, which is why they can be quite difficult to identify from the standard imaging tests. This is where MRD testing can help them understand what is actually happening to you and how well the treatment has worked.
Which types of cancers use MRD testing
MRD testing is usually used for blood cancers where highly sensitive tests can detect small remaining cancer cells. But some other cancers may also use MRD testing.
Different blood cancers
Breast cancer
Lung cancer
Bladder cancer
Esophageal cancer
How is MRD actually detected?
MRD is usually detected using highly sensitive laboratory tests. These are some concentrated tests that can detect tiny remaining cancer cells in your body, which normal tests can’t. Doctors may use your blood or bone marrow samples for the type of test you are undergoing. After this, they may perform flow cytometry or polymerase chain reaction (PCR), which can detect abnormal cancer cells and specific genetic changes.
Why does MRD matter in cancer treatment?
To plan treatment, doctors need to understand your current situation well. With MRD tests, doctors can get clarity about your current condition and see how well the cancer has responded to the treatment. If your MRD comes back negative, then the chances of recurrence are also low. But if the MRD comes back positive, then doctors may perform some additional tests to assess your state. With this, they can make accurate decisions and improve overall outcomes.
Limitations of MRD testing
While MRD testing is a powerful tool for detecting hidden cancer cells, there are certain limitations that you should stay aware of.
Not suitable for every cancer type
Results may vary due to different testing methods
A negative MRD result does not guarantee that you are cancer-free
A positive result does not always mean relapse
May require expert interpretation
Future of MRD in cancer care
With the ongoing research on MRD testing, it is clearly expected to be crucial in personalized treatment. A study published in Digestive Cancers in March 2026 states that MRD testing has improved outcomes and is giving hope towards personalized cancer treatment. Researchers are exploring MRD’s use in solid tumors to make cancer treatment more precise for the future.
Small steps for big difference
MRD is now changing the way doctors can handle cancer. With a clear understanding of the problem, doctors can plan a more personalized treatment that can suit you best. By staying aware and with regular monitoring, you can take timely actions and move ahead with your life.