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What Tests Are Essential to Understand a Myeloma Diagnosis?

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What Tests Are Essential to Understand a Myeloma Diagnosis? from Patient Empowerment Network on Vimeo.

Myeloma diagnoses can vary greatly, so it’s important to understand an individual’s disease before choosing a treatment approach. Dr. Francesca Cottini outlines the tests to better understand myeloma and explains the purpose of in-depth cytogenetic testing.
 
Dr. Francesca Cottini is Assistant Professor in the Division of Hematology at the Ohio State University Comprehensive Cancer Center. Learn more about Dr. Cottini.

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Transcript:

Katherine:

Part of accessing more personalized care starts with test results. Dr. Cottini, what testing should take place following a myeloma diagnosis?  

Dr. Cottini:

So, once somebody is diagnosed with multiple myeloma, there are different types of tests that we need to get. Some are blood tests, some are urine tests, some are bone marrow tests, and others are just different types of imaging. So, the reason for all these tests is because multiple myeloma can kind of go everywhere and can cause the damage to different types of organs. 

So, if we look at blood tests, usually you would see that you get the complete blood count, so we can count the number of red blood cells, white blood cells, and platelets. And then we’ll look at kidney function, through a chemistry profile, calcium levels, multiple myeloma can affect bone cells can affect kidneys. And then, you will see some more sophisticated tests that are really important for the diagnosis of multiple myeloma but also for monitoring and seeing if you’re actually responding to the treatment or you are progressing. 

These two tests that you can see are kind of difficult to say, but very important and needs to be remembered. So, one is called serum protein electrophoresis with immunofixation. And the other one is free light chain assays. 

And the practicum with these two tests is we can identify the specific marker of the multiple myeloma cells and it is either something monoclonal protein or M-protein or kappa light chain numbers. And as I said before, these numbers can be monitored. So, in response to the treatment, they should go down. And then, unfortunately, if we see progression, they might go up again.

And then, urine tests can also give the same type of numbers. Usually, we have our patient keep the urine for 24 hours, for a day, and we can see if there’s monoclonal proteins or light chains there, too. Then there is a least favorite test of all of them that is the bone marrow testing. So, this is very important for us, because it’s where most of the myeloma cells stay. So, we need to have a look at the bone marrow. 

We need like a piece of the bone and some of the liquid tissue to look at specific characteristics of the myeloma. And then, I said before, the myeloma can go to bones, so we need to kind of get some imaging of the bones. These are usually a set of X-rays – it’s called skeletal survey – to see if there is any area that is abnormal or at risk of fractures.  

Then, we are also looking at PET scan, which is a more sophisticated test that is based on sugar consumption. We know that myeloma cells and all cancers enjoy sugar, so with the PET scan, we can see visually where the myeloma cells are in the body.  

Katherine:

What is cytogenetics? 

Dr. Cottini:

So, this is a really interesting question. So, cytogenetics, or FISH tests, are tests that practical tests  allow us to look at the chromosomes of the multiple myeloma. 

So, everybody has 46 chromosomes, right? Multiple myeloma cells can have more of them or less of them. So, they can have – some myeloma cells have 17 chromosomes instead of 46. So, cytogenetics in the karyotype counts how many chromosomes there are. And then, there is another type of test that is called FISH test, or fluorescence in situ hybridization – I get all the difficult names – that practically look at specific area of chromosome. It can tell us if some areas of chromosomes are lost. That’s what you can read as deletions, or practically missing pieces of chromosomes. 

Or there are extra pieces of chromosomes. These are the amplification gains. Or if there are different pieces of chromosomes that stick together. And these are the translocational chromosomes. And all of these data are important for deciding for knowing how aggressive or difficult to treat the myeloma.  

Katherine:

Dr. Cottini, what mutations or abnormalities are you looking for? 

Dr. Cottini:

So, as Dr. Rosko said, and as I quickly previously mentioned, so there are different types of DNA tests that we can do. One is this FISH test, and that’s a standard test. It’s usually done practically everywhere. And it practically tells us if there are specific deletions or changes. 

And we don’t really have yet a specific medication that we know works for specific abnormalities. But all this information is important to decide, as Dr. Rosko said, number of drugs, and maybe that can be helpful in the future when hopefully thanks to the research, we will be able to say, “Based on this abnormality, you would benefit more from this type of treatment.”   

There are other types of tests. One is called DNA testing, so we look at the mutation. So, really to point to small changes of a particular gene. This is done not routinely, but I think it can still give lots of good information. And there are lots of genes that are normally myeloma, that has potential drugs that have been studied, those with multiple myeloma and any other type of cancer.  

What Standard Testing Follows a Myeloma Diagnosis?

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What Standard Testing Follows a Myeloma Diagnosis? from Patient Empowerment Network on Vimeo. 

What tests will you have following a myeloma diagnosis? Are there additional tests you should request? Dr. Joshua Richter provides an overview of key testing for myeloma and why each test is necessary.

Dr. Joshua Richter is director of Multiple Myeloma at the Blavatnik Family – Chelsea Medical Center at Mount Sinai. He also serves as Assistant Professor of Medicine in The Tisch Cancer Institute, Division of Hematology and Medical Oncology. Learn more about Dr. Richter, here.

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Transcript:

Katherine:

What standard testing follows a myeloma diagnosis?

Dr. Richter:

So, the standard testing that follows a myeloma diagnosis is multifaceted. So, the first one is blood work. And we draw a lot of blood tests to look at the bad protein that the cancer cells make. So, we send tests like a protein electrophoresis which tells us how high that bad protein is. We send immunofixation. That test tells us what type of bad protein it is. You’ll hear names like IgG kappa and IgA lambda.

These are the different types of bad proteins made by myeloma cells. Oftentimes, we’ll send urine tests to find out how much of that bad protein that was in the blood is coming out in the urine. We will, typically, do a bone marrow biopsy. It’s a test where we put a needle into the back of the hip bone to look at the marrow itself. And we’ll use that marrow to figure out how much myeloma there is, any other characteristics like the genetic changes in those cells.

The other big thing is imaging. So, the classic imaging that we do with myeloma is something called a skeletal survey. It’s, basically, a listing of X-rays from head to toe. But nowadays, we have newer techniques, things like whole body low-dose CAT scans, something called a PET-CT scan, and MRI scans. And your care team may have to figure out which one is right for you at what given time.

Katherine:

Mm-hmm. Are there additional tests that patients should ask for?

Dr. Richter:

Absolutely. One of the most important things from myeloma has to do with the genetic risk stratification.

So, for almost all cancers, the staging has a very big impact. And people will often think of cancer in stages I, II, III, and IV, and they’re managed very differently depending upon what stage it is. Myeloma has three stages, stage I, II, and III. But the most important thing is, actually, beyond the staging is what’s called the cytogenetics risk stratification. So, it’s really important when the bone marrow is sent to be sure that it is sent for, kind of, advanced techniques. Because you really want that snapshot of exactly what the genetic profile is, because that gives us information of A) how to treat, and B) prognostic, you know, who will tend to do better or worse based on this information. And even though that may not tell us which drugs to use, specifically, it may say, should we do something like a transplant or not? Should we consider a clinical trial early or not?

Katherine:

I see. How do test results affect treatment choices?

Dr. Richter:

So, test results can affect treatment choices in a number of ways. Probably, the most common one is thinking about the routine blood tests like your CBC or complete blood count and your chemistry, which looks at things like your kidney function. Some drugs tend to have more toxicity to the blood counts. So, if your blood counts are very low, we may choose drugs that don’t lower the blood counts very much.

Kidney function which we, usually, measure by something called the creatinine. Creatinine is made by the muscles and cleared out by the kidneys. So, if your kidneys aren’t working very well, you don’t pee out creatinine, and that creatinine level will rise in the blood. If your creatinine level is high, we may choose certain drugs that don’t affect the kidneys or not metabolized or broken down by the kidneys.

The genetic studies that we use – we’re not quite at this base yet where we can say, if you have this genetic abnormality in your myeloma, we should use this drug except there’s some really great data on the cutting edge about a drug called venetoclax.

Venetoclax is a pill that’s used to treat other diseases like lymphoma and leukemia. And it turns out that people who have what’s called a translocation (11:14) which means part of the 11th chromosome and part of the 14th chromosome in the cancer cells swap material.

Those people respond amazingly well to venetoclax. So, we’re starting to have what we would call precision medicine where we find your genetic abnormalities, not that you got from your parents or passed to your kids, but the genetics inside the tumor cells to tell us which treatments will work best for you.