IBS is associated with small fibre pathology in fibromyalgia patients
Greater IBS severity in fibromyalgia patients correlates with reduced intraepidermal nerve fibre density and higher overall symptom burden.
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What the study showed
Fibromyalgia patients with severe IBS showed higher widespread pain index and symptom severity scale scores compared to those with mild-moderate IBS. The abstract suggests an association between IBS severity and neuropathological evidence of small fibre involvement (reduced IENFD). Nearly half of patients (47.1%) fell into the severe IBS group.
How it was done
Monocentric cross-sectional observational study of 89 fibromyalgia patients undergoing clinical and psychological assessments; skin biopsy with IENFD quantification was performed in 57 patients, with IBS severity measured by IBS-SSS.
Risk of bias
Cross-sectional design precludes causal inference. Small, single-centre sample limits generalisability; the abstract was truncated, preventing access to full results and correlation analyses.
What this study does NOT prove
The study does not prove that IBS causes small fibre pathology or that gut microbiome interventions alter peripheral neuropathy in fibromyalgia.
In clinical practice
Severe IBS in fibromyalgia patients may signal greater peripheral neuropathic dysfunction, warranting more thorough clinical evaluation. This study provides no basis for modifying therapeutic strategies.
Limitations
Cross-sectional design precludes causal inference. Small, single-centre sample limits generalisability; the abstract was truncated, preventing access to full results and correlation analyses.
Technical appendix
Version history
- 1.0 · 2026-07-14 — Auto-generated under Evidence Standard v1.0
Paid access: structured summary from public metadata; consult the original study at the source.