Sometimes cancer patients experience problems such as peripheral neuropathy as a result of treatment; or even as a result of the cancer itself. Such patients may need to have an EMG performed to diagnose the nephropathy. Earlier this week I had to take my son Ashton to the hospital in Sioux Falls in order to have an EMG performed. Fortunately Ashton does not have cancer and instead is being diagnosed for some sort of hypermobility. But since the EMG test performed on him is the same thing that would be done for cancer patients I thought it would be worthy to do a post about his EMG experience.
What is an EMG test and peripheral neuropathy?
Before going on it might be helpful to find out what these terms actually mean. Here is part of the definition of peripheral neuropathy from the Mayo website:
Peripheral neuropathy, a result of damage to your peripheral nerves, often causes weakness, numbness and pain, usually in your hands and feet. It can also affect other areas of your body.
I was warned by the oncology nursing staff that chemo could actually cause peripheral neuropathy. When looking at the Mayo page about peripheral neuropathy I noticed one interesting possible cause which specifically mentions lymphoma:
Bone marrow disorders. These include abnormal protein in the blood (monoclonal gammopathies), a form of bone cancer (osteosclerotic myeloma), lymphoma and amyloidosis.
To diagnose peripheral neuropathy an EMG may be ordered. EMG stands for
Electromyography. Here is part of what Mayo has to say about an EMG:
Electromyography (EMG) is a diagnostic procedure to assess the health of muscles and the nerve cells that control them (motor neurons). EMG results can reveal nerve dysfunction, muscle dysfunction or problems with nerve-to-muscle signal transmission.
In the next two sections I will share Ashton’s experience with two different parts of an EMG test.
Getting shocked – the nerve conduction study
The first part of the EMG test Ashton went through was the nerve conduction study. Ashton had both arms and legs tested in this part of the study. It began with one of his arms. The tech hooked up electrode stickers to his hand, and then various places on his arm. An electric shock was sent through his arm.
Ashton was very nervous about this part of the test. The tech reassured him it was very little electricity, and it would start low and only increase in amplitude as necessary. To show Ashton it was OK, the tech used the probe on himself. I’m not really sure that made Ashton feel better.
I’m not sure how many pathways the tech tested on each limb, but it seemed to be quite a few. Ashton didn’t seem to mind most of the shocks. The only ones on his arm he said hurt occurred when the tech did the funny bone and the wrist. On his legs Ashton only complained about the shock right at his ankles. Other than those few areas, Ashton admitted the test wasn’t so bad.
Getting poked – the needle EMG
Ashton was even more noticeably nervous about the second EMG test. In the needle EMG the doctor used a needle to poke into Ashton’s muscle. The doctor would then measure the electrical activity of that muscle. Ashton was shown a needle to ensure him that it was not big and won’t leave a big hole. The needle itself looks similar to one used in acupuncture. This test apparently records how active a muscle is.
Luckily only one arm and one leg needed to be tested. I’m not sure how many pokes the doctor did, but I bet if I asked Ashton he could tell me. Ashton said he definitely felt the needle go into his muscle. When the doctor had to move the needle around in the muscle Ashton complained it was very sharp. During this part of the test Ashton had to either relax muscles or move joints according to what the doctor wanted. While this test was shorter than the first, Ashton said it seemed to take much longer.
There was only one point where I think the pain was more than Ashton was ready for. That was in Ashton’s calf and he asked if the doctor could hurry. There was also a little bit of blood coming out of the hole in the calf. None of the other punctures left any sign of a needle being used. At the end Ashton said he would prefer not to do that test ever again.
I don’t have his official results in front of me. But I do know what the doctor said. In the first EMG test Ashton had electricity ran through his nerves. According to the doctor this part of the test went very well and there is no sign of problems with the nerve pathways tested. This was really good news, since the tingling and numbness Ashton often feels in his hands and feet are not a result of these nerves having issues.
Ashton also did well in the second part of the test. Since the doctor couldn’t find any muscle issues in the arm or leg tested, he decided it was not necessary to test the other arm or leg. This was not surprising. When being treated by doctors it has always been noted that his muscles seem to be strong, and that something else such as ligaments were likely his problem.
On one hand it is good that no problems were found in either EMG test. The results further confirm his hypermobility and pain issues are likely caused in the joints. But at the same time we still don’t have any real answers as to why he has such extreme pain and numbness. His latest round of genetic testing should be done soon. Hopefully those results will give some answers.
Even though Ashton does not have cancer I thought his experience would be worth sharing on this blog. Many cancer patients experience peripheral neuropathy and may have to go through an EMG test. Despite Ashton experiencing some very short-term pain, it was well worth getting the test done. In his case the EMG was done to rule out certain conditions. With cancer patients it is more likely the EMG would be done to confirm and come up with a treatment plan for conditions such as peripheral neuropathy.
Today’s Song – Hurt
After seeing Ashton go through pain I couldn’t help but think of the classic Nine Inch Nails song Hurt. Technically the song is more about regret. But I thought the Johnny Cash cover of the song was well worth sharing in this post.
Bonus song – I won’t back down
Johnny Cash did some great covers in his American Recording series. One of my personal favorites happens to be Cash’s cover of Tom Petty’s song I Won’t Back Down. Ashton also happens to know and like this song because it was featured in the movie Barnyard.