How does Signatera test help a cancer patient aged 65?

Question

Hello doctor,

My mother is 65 years old, and her oncologist recently suggested something called a Signatera blood test, but we have never heard of this before.

What is a Signatera blood test, and how does it help a 65-year-old cancer patient?
Does this test replace the regular scans and biopsies she has been undergoing? We are also concerned about whether this test is available in all hospitals or only in specialized cancer centers.
She completed her chemotherapy six months ago, and the doctor wants to monitor her closely for any recurrence. Is this test accurate enough to detect cancer coming back at an early stage?

Please guide us.

Thank you.

Answer 1

Hello,

Welcome to icliniq.com.

I have read your query and understand your concern.

I understand why this test sounds unfamiliar, as it is a relatively newer method used mainly in oncology follow-up. The Signatera test is a blood test that looks for tiny fragments of cancer-related DNA (deoxyribonucleic acid) in the bloodstream.

It is designed specifically for each patient based on their original tumor, which makes it quite sensitive in picking up very early signs of cancer coming back after treatment. In your mother’s case, since she has completed chemotherapy, it is being used as a way to monitor for recurrence at an early stage.

This test does not replace scans or biopsies. It is used along with regular follow-up imaging. If the test suggests a possible recurrence, doctors usually confirm it with scans before making any treatment decisions.

Its main advantage is that it can sometimes detect changes earlier than imaging, allowing closer observation or earlier intervention.

In terms of accuracy, it is considered a useful and sensitive tool when done over time, especially for tracking trends rather than relying on a single result. However, it is always interpreted along with clinical findings and imaging.

This test is not yet available in all hospitals. It is usually offered through specialized cancer screening centers or sent to dedicated laboratories, and your oncologist will guide you regarding availability.

So overall, this test is an additional monitoring tool to help keep a closer watch after treatment, not a replacement for the usual follow-up methods.

I hope I have addressed all of your queries and concerns.

For more queries, do follow up anytime. I am here to help.

Thank you.