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An Expert Explains Predictive Biomarker Testing for Lung Cancer

An Expert Explains Predictive Biomarker Testing for Lung Cancer from Patient Empowerment Network on Vimeo.

What is lung cancer biomarker testing? Dr. Grace Dy defines both biomarker and molecular testing and explains how these test results are used in lung cancer patient care.

Dr. Grace Dy is Chief of Thoracic Oncology and Professor of Oncology in the Department of Medicine at Roswell Park Comprehensive Cancer Center in Buffalo, New York. Learn more about Dr. Grace Dy.

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Transcript:

Dr. Grace Dy:

My name is Grace Dy. I’m a thoracic medical oncologist at Roswell Park Comprehensive Cancer Center here in Buffalo, New York. 

Katherine Banwell:

Thank you for being with us today.  

Dr. Grace Dy:

Thank you for having me. 

Katherine Banwell:

What is biomarker testing, and is this the same as molecular testing for non-small cell lung cancer? 

Dr. Grace Dy:

That’s a very good question. So, let’s first maybe define what biomarker means. So, biomarker is an all-encompassing term relating to a measurement of a biological parameter. That’s what it means.  

So, you can actually have biomarker related to imaging. So, it’s not specific to a particular test. But what it’s trying to do is to guide doctors in making decisions. So, you can have, for example, a PET scan as a biomarker to indicate the effectiveness of therapy. 

So, it’s not specific to a test. So, it’s a broader scope. But in cancer, generally, it’s used interchangeably with molecular testing. And molecular testing is a more focused test on the genetics of the cancer.  

In some aspects, sometimes it also refers to testing for proteins, characteristics of different proteins in the cancer. Again, to help doctors generally define what might be a better treatment option that is personalized to the patient’s cancer. 

In some instances, the biomarker can also be what we call prognostic, meaning independent of what we do with the treatment, it may define to us how well a patient will survive or have their outcomes, whether they have treatment or not. 

So, those are maybe the nuances between a predictive versus a prognostic biomarker. But for all intents and purposes, the most common test that we use for lung cancer patients are what we call predictive biomarker testing. Molecular testing is one of the ones that we often commonly request to help us define treatment modalities, especially in non-small cell lung cancer.