Tag Archives: myalgic encephalopathy

New criteria redefine ME

What are you, kidding me? Good news in the land of ME/CFS? Surprisingly: yes.

Every patient has her own nomenclature for her illness, because “chronic fatigue syndrome” has stuck around so long as a garbage diagnosis, and myalgic encephalopathy/encephalomyelitis has never been solidly defined. But now we have both a name and a set of criteria that make solid sense and should greatly aid research efforts.

The International Consensus Criteria was developed by scientists from 13 countries, after exhaustive research. (For a good summary and analysis, see this article by Kimberly McCleary, president and CEO of the CFIDS Association.) Here are some very important points.

1. The illness is defined foremost by the symptom that disables so many of us: post-exertional malaise, now with an even more specific name, post-exertional neuroimmune exhaustion (PENE). This is major. The popular perception of ME has been that it’s all about fatigue, due largely to the term “chronic fatigue syndrome,” which is both vague and misleading. Yes, we are certainly fatigued, but it’s because of PENE.

This is why all that “we can cure fatigue” quackery is so wrong at its very foundation. They intentionally conflate CFS with “fatigue,” which is shooting at the wrong target. I’m actually in the mood now to go pick a fight with one of them, like Teitelbaum, by asking “how does your fatigue product address neurosensory, perceptual and motor disturbances?” (Of course treating fatigue is part of ME, especially for people with milder cases who need help through, say, a work day.)

2. The definition of ME here is specific, yet flexible enough to allow for the range of symptoms that patients experience. The criteria call for a certain number of symptoms in a certain number of categories, all fitting inside the three broad categories of neurology, immunology, and energy production. All current patients can learn whether they meet the criteria for ME, and people who don’t know anything about it can be given a solid diagnosis by their doctor.

This means that one of the biggest problems with ME/CFS research — how the patients are identified as having it — has just been reduced quite a bit. Researchers will be able to use the consensus criteria to replicate each other’s studies, something that has been difficult in the past. People can find out if they’ve been misdiagnosed in some way, since ME symptoms can mirror so many other illnesses, including mental ones.

Now don’t close this page in a fit of red-hot fury or anything; I have the same disgust for Simon Wet Parsley* that so many of us do. But it is certainly true that patients with major depression and even bipolar disorder have been misdiagnosed, in both directions. This is unquestionably good, because those patients can likely get much better treatment for their illness. Additionally, people who have self-diagnosed ME/CFS because they feel tired all the time can now rule it in or out, and get the proper treatment for a different problem or illness, if needed.

3. It’s true that this consensus has only just been published in the Journal of Internal Medicine, and it may certainly end up being debated on both a large and a small scale. But a great deal of the animosity surrounding XMRV rests so squarely on the vagueness of defining criteria, so this is in any case a great step towards removing some of the argument. If you have been reading any ME/CFS discussions lately, that’s a Herculean victory.

I recognize that my excitement about this consensus comes partly from the fact that it’s designed and worded in a way that matches my own educated guesses about ME/CFS. I’m not completely unbiased — and please, if you have a different take on this, do post a comment as I personally have not heard any naysayers yet, and I want to know what problems, if any, exist with this. I remember reading the news of the original XMRV paper, and feeling cautiously optimistic. This, on the other hand, made me joyous. So my predictions are premature, but I don’t think they’re impossible.

Patients who match the criteria now have an excellent rebuttal to any “It’s all in your head” they might receive. It’s also an answer to another chestnut, “You just need to get more sleep.” It’s probably too optimistic to hope that some patients may also quit turning to quacks and snake-oil salespeople, now that the diagnosis/treatment situation has been better clarified, but what the hell, I hope this too.

I’ve called my illness “chronic fatigue syndrome” because of the impression that patients whose symptoms are predominately immune fell into that category, while “ME” was for people with predominately cerebral symptoms. I was partly right about the focus on brain dysfunction, but have learned since that many of my immune-seeming problems are in fact due to just that. (Insert joke here.)

Going through the criteria was surprisingly emotional for me. It’s one thing to fall into a vague category of patients; it’s another to show objectively that I meet the criteria for a much less vague illness. There were symptoms listed that I have in spades but haven’t previously seen described so perfectly, such as “recurrent feelings of feverishness with or without low grade fever,” under the category of “Loss of thermostatic stability.” In a sense it was like having someone validate my symptoms, some of which I’m prone to think are all in my head. By the time I was done reading and rereading the paper and the criteria, I’d decided to identify myself as having ME from now on, while referring to the illness in general as ME/CFS.

Although nothing at all has really changed, it feels a little like a change in identity. A change that I deeply appreciate.

* Real name Simon Wessley, the much-maligned U.K. doctor who insists that the etiology of ME/CFS starts in the mind. He’s close; it does start in the brain, but not the thinking part of it. Apparently his name becomes far more apropos when translated into and then out of another language, and thanks to Linda for pointing this out!

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Will there ever be a cure for CFS?

I was asked this question on Formspring by @jwhouk the other day, and I decided it was worthy of a better answer than a few lines on Twitter. Actually, the way he phrased it was

Deep down in your heart of hearts (or whatever you want to call it) — do you believe/think there will ever be a cure for CFS? Or at least an understanding of causes for it?

which I like because I feel more comfortable talking about my beliefs and speculations than the hard science. And then the timing was funny as this story came out yesterday. It’s a report on a study published in the Proceedings of the National Academy of Sciences (PNAS), detailing a replication study seeking XMRV in patients with chronic fatigue syndrome. The PNAS paper had been held for some time, frustrating and angering patients, and now that it’s out, the results are interesting. Although the researchers did not find XMRV, they did find a related family of retroviruses. This isn’t going to end the controversy over XMRV anytime soon — there are many questions remaining about the selection of patient cohorts, why other studies were unable to find XMRV, and so forth — but more information is always good.

This is part of my answer to the question, this fact that right now there is more interest in CFS research than there has been in years. For one thing, this is obviously directly good news for people who want a cure. Even if XMRV or MLV turn out to be complete red herrings, who knows what else may be discovered along the way. And a major side benefit of this research is that more people — physicians and otherwise — learn that CFS is a true somatic problem that warrants research. The disease and the people who have it receive validation, which may lead to better care and further research as well. So these are all positive signs even if there are some very questionable aspects, such as patients starting dangerous treatments for things they don’t even know they have yet.

The problem with CFS is that, although we patients tend to insist on it being treated as a disease, it is not one. It is a syndrome — an association of related symptoms — and those symptoms and their severity differ enormously from person to person. (It’s important to note this does not mean that anyone with a few fatigue-related symptoms has CFS. There are several sets of different but related diagnostic criteria.) Some patients have mostly neurological symptoms, and tend to identify as having ME (myalgic encephalopathy), while others like me exhibit almost exclusively post-viral symptoms. There are endless debates over the name of the syndrome, and whether it should or shouldn’t be lumped together, as it often is, as ME/CFS. This is why I remain skeptical about XMRV: does it really seem possible that a single retrovirus, or even a family of them, could cause such an enormous disparity in etiologies, disease progression, symptoms, and so forth? Possibly in one particular set of patients, but what about everyone else?

So I don’t really envision a vaccine or gene therapy anytime soon or ever that will wipe out CFS, although I do expect better therapies and treatments. I think what is more likely to happen is that as we increase our understanding of various illnesses, especially autoimmune ones, patients formerly diagnosed with CFS will be found to have something else. This happens frequently enough now (although sometimes in the other direction, as in patients with depression who are later found to have CFS as a somatic cause), and there’s no reason to think it won’t continue. As medical science becomes more knowledgeable about autoimmune disorders, demyelinating disorders, and many other related areas, I think CFS patients will continue to be rediagnosed with more specific — and hopefully treatable! — illnesses. In this sense, medicine will “cure” CFS by redefining patients into other categories, and with luck, having no more use for this “garbage can” of a diagnosis.

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