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Authors: Iñigo Murga Gandasegui, Larraitz Aranburu Laka, Pascual-Ángel Gargiulo, Juan-Carlos Gómez-Esteban, José-Vicente Lafuente Sánchez
Published: 27 September 2021
doi: 10.3390/medicina57101030
Abstract
Published: 27 September 2021
doi: 10.3390/medicina57101030
Abstract
Gandasegui et al. said:Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) is a disorder of
unknown physiopathology with multisystemic repercussions, framed in ICD-11 under the heading
of neurology (8E49). There is no specific test to support its clinical diagnosis. Our objective is to
review the evidence in neuroimaging and dysautonomia evaluation in order to support the
neurological involvement and to find biomarkers serving to identify and/or monitor the pathology.
The symptoms typically appear acutely, although they can develop progressively over years; an
essential trait for diagnosis is “central” fatigue together with physical and/or mental exhaustion
after a small effort. Neuroimaging reveals various morphological, connectivity, metabolic, and
functional alterations of low specificity, which can serve to complement the neurological study of
the patient. The COMPASS-31 questionnaire is a useful tool to triage patients under suspect of
dysautonomia, at which point they may be redirected for deeper evaluation. Recently, alterations
in heart rate variability, the Valsalva maneuver, and the tilt table test, together with the presence of
serum autoantibodies against adrenergic, cholinergic, and serotonin receptors were shown in a
subgroup of patients. This approach provides a way to identify patient phenotypes. Broader studies
are needed to establish the level of sensitivity and specificity necessary for their validation.
Neuroimaging contributes scarcely to the diagnosis, and this depends on the identification of
specific changes. On the other hand, dysautonomia studies, carried out in specialized units, are
highly promising in order to support the diagnosis and to identify potential biomarkers. ME/CFS
orients towards a functional pathology that mainly involves the autonomic nervous system,
although not exclusively.