SOC
Senior Member
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Hi SOC
To be clear, the distinction between ME CFS and PVFS is not, as far as I know HFME - it is my own - based on my own reading and research.
I am afraid that if that is in fact the MESA position - that they have highlighted that as the defining feature of ME, then it is unfortunately wrong.
It is not consistent with the literature.
I would suggest that the MESA have made it their defining feature, but for medical classification and diagnostic purposes this is not the defining feature of ME. It is only a part of the illness. I suggest the reason they have erroneously elevated this to the defining feature of ME, is to incorporate persons who might have an ME or PVFS like illness without clear evidence of CNS dysfunction ie think CCC.
The CCC clearly states that there is CNS dysfunction in ME/CFS.
5. Neurological/Cognitive Manifestations: Two or more of the following difficultiesshouldbe present: confusion,impairmentofconcentrationand shortterm memory consolidation,disorientation, difficulty with information processing, categorizing and word retrieval, andperceptual and sensory disturbances e.g. spatial instability and disorientation and inability tofocus vision. Ataxia, muscle weakness and fasciculations are common. There may be overloadphenomena: cognitive,sensorye.g.photophobiaandhypersensitivitytonoiseand/oremotional
overload,whichmayleadtocrashperiodsand/oranxiety.
6. AtLeastOneSymptom fromTwooftheFollowingCategories:
__a. Autonomic Manifestations: orthostatic intoleranceneurallymediated hypotension(NMH),postural orthostatic tachycardiasyndrome(POTS), delayedpostural hypotension;light-headedness; extremepallor; nauseaandirritablebowelsyndrome; urinaryfrequencyand bladder dysfunction; palpitations with or without cardiac arrhythmias; exertional dyspnea.
__ b. NeuroendocrineManifestations: loss of thermostatic stability subnormal bodytemperature and marked diurnal fluctuation, sweating episodes, recurrent feelings offeverishness and cold extremities; intolerance of extremes of heat and cold; marked weight change anorexia or abnormal appetite; loss of adaptability and worsening ofsymptomswithstress.
__c. ImmuneManifestations: tender lymph nodes, recurrent sore throat, recurrent flu-likesymptoms, generalmalaise, newsensitivitiestofood, medicationsand/orchemicals
Furthermore, the CCC does not claim that fatigue is the defining characteristic of ME/CFS.
Maybe you're thinking of Fukuda or some other definition?