Fibromyalgia & musculoskeletal pain

Outcome of small fibers pathology in fibromyalgia: a real life longitudinal observational study.

Clin Exp RheumatolPublished Prospective cohort study

Authors' conclusion

Small fibre impairment seems stable in medium term in FM. A possible influence of small fibre dysfunction on motor performance could have a role in FM evolution.

Study context

Population
Fibromyalgia (FM) patients assessed by skin biopsy and clinical assessment
Participants
62 patients
Outcome
Evolution of skin nerve fibre density (IENFD) in FM
Follow-up
18 months
Methodological detailslongitudinal, observational, real-life
  • Longitudinal
  • Observational
  • Real-life

Main finding

As reported in the abstract

IENFD · T0 and T1 (18 months)

Intraepidermal nerve fibre density (IENFD) normal at T0

10

IENFD reduced at proximal thigh site at T0

46

IENFD decreased at proximal and distal foot site at T0

6

Observational data: associations, not effects.

Further findings

Clinical scores at T1

BPI pain sub score, DN4 and fatigue improved

Predictors of more severe disability (Fibromyalgia Impact Questionnaire (FIQ)) at T1

Reduced IENFD at proximal and distal sites, fatigue and BPI motor and work sub scores were predictors

Effect of drugs and physical exercise on fatigue

Reduced IENFD associated with a minor effect of antiepileptics and/or antidepressants and physical exercise on fatigue

Original publication

Outcome of small fibers pathology in fibromyalgia: a real life longitudinal observational study. Clin Exp Rheumatol. Published 17 March 2022. doi:10.55563/clinexprheumatol/ld0lxn

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