Chronic fatigue syndrome

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Chronic fatigue syndrome is the name coined by the Centers for Disease Control (CDC) in response to an outbreak of "chronic flu like illness" at Incline Village, Lake Tahoe in 1984-1985.[1]

As of February 2013, the CDC recognized that more than one million Americans have CFS.[2] The February 2015 Institute of Medicine report stated that there are 836,000 to 2.5 million ME/CFS patients.[3]

Chronic Fatigue Syndrome should be distinguished from chronic fatigue, which is a symptom of many different conditions, though not a condition in its own right. These terms are often confused by the media, healthcare practitioners and the general public. CFS is a grossly misnamed disease whereas CF is a symptom of many diseases, illnesses and drug therapies.[4][5] Dr. Jarred Younger explains chronic fatigue and begins by stating "Fatigue is not a disease and it is not even a symptom. So fatigue is a alarm system and the most general alarm system the body has." Webinar with Jarred Younger, Ph.D. (@6:04-7:54)


Symptoms[edit | edit source]

Hallmark symptom[edit | edit source]

  • Post-exertional malaise (PEM) is the hallmark symptom of ME/CFS. After physical or mental exertion (which for some patients can be a shower or making out a to-do list, others grocery shopping, socializing or reading a news article, while some just walking to the mailbox, getting to the doctor or mentally following a T.V. program) there is a payback which can be delayed 24-48 hours and can last 24 hours or more. The patient will experience even greater fatigue as well as exasperating the flu-like symptoms and body pain. Every patient experiences different symptoms and symptom severity from different activities and exertion output according to how sick he or she is with the disease.[6][7][8]


Regarding PEM the CFIDS Association of America states: "This is a term which describes a symptom in which exercise or exertion can bring on malaise (illness). In the case of people with ME/CFS, malaise often occurs during a period some 24-72 hours after exertion. For example, in some cases, a short walk can worsen ME/CFS symptoms two days later. This lack of understanding about the delayed onset of symptoms has, in the past, made it harder to test for ME/CFS. Follow up tests, taken less than 24 hours after an initial exercise test, may show that the patient can still perform activities at the same level (before post exertional malaise has a chance to take hold)."[9]

Core and additional symptoms (see IOM Clinicians Guide below)[edit | edit source]

US Government guides on symptoms[edit | edit source]

Canada guides on symptoms[edit | edit source]

Other symptoms, comorbids[edit | edit source]

Expanded lists of symptoms[edit | edit source]

Disease onset[edit | edit source]

CFS usually comes on with a flu-like illness, virus or infection[12] where the patient is left never the same and with varying symptoms and disease severity fluctuating day to day, week to week, month to month, year to year and decade to decade as well as varying symptoms and disease severity among patients.[13][14]

Female to male ratio[edit | edit source]

Like many auto-immune and neuro-immune diseases where mostly women are afflicted,[15] the ME/CFS female/male patient ratio is 6:1.[16] Fibromyalgia has a F/M 7:1 ratio and some ME/CFS patients have this additional diagnosis.[17][18]

Jennifer Brea gives a WMC Live radio interview addressing F/M auto-immune ratio and the disease at 5:00.

Clinical Course[edit | edit source]

From the CDC: What's the Clinical Course of CFS?

The severity of CFS varies from patient to patient. Some people can maintain fairly active lives. For most patients, however, CFS significantly limits their work, school, and family activities for periods of time.
While symptoms vary from person to person in number, type, and severity, all CFS patients are limited in what they can do to some degree. CDC studies show that CFS can be as disabling as multiple sclerosis, lupus, rheumatoid arthritis, heart disease, end-stage renal disease, chronic obstructive pulmonary disease (COPD), and similar chronic conditions.
CFS often affects patients in cycles: Patients will have periods of illness followed by periods of relative well-being. For some patients, symptoms may diminish or even go into complete remission; however, they often recur at a later point in time. This pattern of remission and relapse makes CFS especially hard for patients to manage. Patients who are in remission may be tempted to overdo activities when they're feeling better, but this overexertion may actually contribute to a relapse.
The percentage of CFS patients who recover is unknown, but there is some evidence to indicate that patients benefit when accompanying conditions are identified and treated and when symptoms are managed. High-quality health care is important.[19]

Name controversy[edit | edit source]

The name Chronic Fatigue Syndrome is controversial, as many consider it stigmatising. For decades, patient advocates have been lobbying the CDC to instead use the name Myalgic Encephalomyelitis (ME), though the CDC has refused.[20] Most patients and patient organisations prefer the name ME, or the hybrid ME/CFS.

In February 2016, Dr Anthony Komaroff, who was part of the Centers for Disease Control (CDC) group of clinicians who coined the name Chronic Fatigue Syndrome, said of it:

"I think that was a big mistake because the name, in my opinion, and the opinion of a lot of people, it both trivialises and stigmatises the illness. It makes it seem unimportant, maybe not even real".[21]

Dr. Nancy Klimas discusses the name controversy in the video ME/CFS Diagnosis and Name.

Notable studies[edit | edit source]

History[edit | edit source]

Learn more[edit | edit source]

See also[edit | edit source]

References[edit | edit source]

<references>

[3]

[21]

[23]

[22]

  1. Fatigue 'Virus' Has Experts More Baffled And Skeptical Than Ever - NY Times July 1987
  2. Chronic Fatigue Syndrome - CDC
  3. 3.0 3.1 Institute of Medicine (USA); Committee on the Diagnostic Criteria for Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (February 10, 2015), Beyond Myalgic Encephalomyelitis/Chronic Fatigue Syndrome: Redefining an Illness
  4. Chronic Fatigue vs. Chronic Fatigue Syndrome - One's a Symptom, One's a Disease - About.com Health FMS/ME/CFS By: Adrienne Dellwo
  5. Chronic Fatigue Versus Chronic Fatigue Syndrome What's the Difference? - About.com Health FMS/ME/CFS - By: Carol Eustice
  6. Unraveling Post-Exertional Malaise - Solve ME/CFS Initiative By: Jennifer M. Spotila, J.D. - Plus a link to all 4 parts
  7. Chronic Fatigue Syndrome - Symptoms - Web MD
  8. Post-Exertional Malaise - About.com Health - FMS/ME/CFS
  9. - What Health - International CFS/ME Awareness Day 2017 - CFIDS Association of America
  10. Myalgic encephalomyelitis: International Consensus Criteria - Wiley - Journal of International Medicine
  11. What is ME/CFS? - Solve ME/CFS Initiative
  12. The Lipkin Study, The Vagus Nerve Infection Hypothesis and HHV-6: Kristin Loomis of the HHV-6 Foundation Talks – Pt. I - Health Rising - By: Cort Johnson - June 2014
  13. Chronic Fatigue Syndrome - Symptoms - Web MD
  14. Facts (ME/CFS) Severity
  15. Fact Sheet Autoimmune Disease in Women: NWHIC - Right Diagnosis - Aug 2015
  16. Chronic fatigue syndrome/myalgic encephalomyelitis: an update. - PUBMed Dec. 2010
  17. Fibromyalgia - CDC
  18. What Is ME/CFS (Fibromyalgia) Solve ME/CFS Initiative
  19. What's the Clinical Course of CFS? - CDC
  20. A Disease in Search of a Name: The History of CFS and the Efforts to Change Its Name - Chronic Fatigue Support
  21. 21.0 21.1 Komaroff, Anthony; Iskander, John (February 17, 2016), "Interview with Dr Anthony Komaroff", CDC Public Health Ground Rounds - Beyond the Data - Chronic Fatigue Syndrome: Advancing Research and Clinical Education Cite has empty unknown parameter: |displayauthors= (help)
  22. 22.0 22.1 Shan, ZY; Kwiatek, R; Burnet, R; Del Fante, P; Staines, DR; Marshall-Gradisnik, SM; Barnden, LR (April 28, 2016), "Progressive brain changes in patients with chronic fatigue syndrome: A longitudinal MRI study", Journal of magnetic resonance imaging: JMRI, doi:10.1002/jmri.25283, PMID 27123773
  23. 23.0 23.1 Jaime S (May 5, 2016), "Progressive Brain Changes in Patients with Chronic Fatigue Syndrome: Are our Brains Starved of Oxygen?", #MEAction
  24. Chronic Fatigue Patients Suffer 3 Major Brain Abnormalities; Findings May Lead To Clearer Diagnosis. - Patient Health Care