Hi Fire, Here is one very recent study that shows the presence of white matter lesions in CFS.
http://bjp.rcpsych.org/content/167/1/86.abstract
Of course, just as important as their presence is where they come from. Both MS and CFS patients lack B12. In the study entitled
lasma Vitamin B12 Status and Cerebral White-matter Lesions it states in the conclusion, "These results indicate that vitamin B12 status in the NORMAL RANGE is associated with severity of white-matter lesions, especially periventricular lesions...it is hypothesised that the association is explained by effects on myelin integrity.." It also states, "Poorer vitamin B12 status was SIGNIFICANTLY associated with greater severity of white-matter lesions....
Morning,
I don't dispute the host of findings of 'lesions' in 'CFS/ME' patients. What I am saying is that these generalised 'lesions' do not equate with damage to myelin which is the determining factor in Multiple Sclerosis. I have not read anywhere that 'lesions' equate to myelin damage - indeed many of these studies that I have read are ambiguous in defining the nature of said 'lesions' and that is the crux of the problem.
The next issue is that these 'lesions' are (to take your first paper) found in non-'CFS/ME' patient samples too:
'White-matter lesions were found in a minority from all groups.' That is to say in the 'CFS/ME patient samples and in 'controls' and the patients also included those with depression (which may or may not have a bearing on this).
Here is some additional information on the presence of white matter lesions in CFS. It states, "Pathological changes have been observed in CFS patients, including white matter lesions in the CNS and cerebral hypoperfusion. Other findings suggest CNS involvement include vestibular dysfunction and GAIT ABNORMALITIES."
http://www.chiro.org/nutrition/ABSTRACTS/Chronic_Fatigue_Syndrome.shtml
I think these diseases are all one and the same. I believe they have been given different names based on the progression and severity of symptoms.
From that second paper the references to 'lesions' come from the following sources and I will try and have a read through them later to see if we can determine the exact nature and purpose of these 'lesions':
Buchwald D, Cheney PR, Peterson DL, et al. A
chronic illness characterized by fatigue,
neurologic and immunologic disorders, and
active human herpesvirus type 6 infection. Ann
Intern Med 1992;116:103-113.
Natelson BH, Cohen JM, Brassloff I, Lee HJ.
A controlled study of brain magnetic resonance
imaging in patients with the chronic
fatigue syndrome. J Neurol Sci 1993;120:213-
217.
Lange G, DeLuca J, Maldjian JA, et al. Brain
MRI abnormalities exist in a subset of patients
with chronic fatigue syndrome. J Neurol Sci
1999;171:3-7.
Until such time as we can make a clear connection between these 'lesions' and myelin damage (which I have to say I don't believe are the same thing), then we surely cannot draw conclusions.
As usual I suppose it depends on what the researchers are looking for in these studies. I have not heard of a study that looks at 'CFS/ME' patients specifically for myelin damage or even a decent explanation for these 'lesions' to be honest. It would be useful to find such things though I doubt if myelin damage has ever been observed - simply because that would mean a diagnosis of Multiple Sclerosis would it not?
Does anyone know if 'inflammation' = 'lesions' by any chance? I mean it is another general term I know but one that keeps cropping up and I have never really gotten my head around how they identify 'inflammation' let alone determine it as a defining characteristic.
Fire