E3 PreliminaryModerate confidencePEM unclearReview-NarrativePeer-reviewedMachine draft
Symptom overlap and comorbidity of irritable bowel syndrome with other conditions.
Frissora, Christine L, Koch, Kenneth L · Current gastroenterology reports · 2005 · DOI
Quick Summary
This review examined how irritable bowel syndrome (IBS) frequently occurs alongside other conditions, both in the digestive system and elsewhere in the body, including chronic fatigue syndrome and fibromyalgia. The authors explored why these conditions often happen together and what they might have in common. Understanding these connections could help doctors better recognize and treat patients who experience multiple overlapping symptoms.
Why It Matters
This study is relevant to ME/CFS patients because it documents the frequent co-occurrence of IBS with chronic fatigue syndrome and explores shared pathophysiologic mechanisms like visceral hypersensitivity. Understanding these connections may help clinicians recognize gastrointestinal dysfunction as part of ME/CFS and guide more integrated treatment approaches.
Observed Findings
- Frequent symptom overlap exists between IBS and other gastrointestinal motility disorders (chronic constipation, functional dyspepsia, GERD)
- Comorbidity occurs between IBS and non-motility GI disorders (celiac disease, lactose intolerance)
- IBS frequently co-occurs with somatic syndromes including fibromyalgia and chronic fatigue syndrome
- Visceral hypersensitivity and gastrointestinal dysmotility appear as common features across multiple overlapping conditions
Inferred Conclusions
- Multiple gastrointestinal and non-gastrointestinal disorders share overlapping symptoms and frequently occur together in the same patients
- Shared pathophysiologic mechanisms, particularly visceral hypersensitivity and dysmotility, may explain comorbidity patterns
- Identifying commonalities among these conditions could improve clinical recognition and management of patients with multi-system symptoms
Remaining Questions
- What are the precise prevalence rates of IBS comorbidity with each condition reviewed?
- Which underlying pathophysiologic mechanisms are primary drivers versus secondary consequences of symptom overlap?
- Do different subgroups of IBS patients show distinct comorbidity patterns with specific conditions?
What This Study Does Not Prove
This review does not establish causal relationships between IBS and other conditions, nor does it quantify prevalence rates of comorbidity. It also does not prove that shared mechanisms of visceral hypersensitivity are the primary drivers of symptom overlap, only that they may contribute.
Metadata
- DOI
- 10.1007/s11894-005-0018-9
- PMID
- 16042909
- Review status
- Machine draft
- Evidence level
- Early hypothesis, preprint, editorial, or weak support
- Last updated
- 10 April 2026
About the PEM badge: “PEM required” means post-exertional malaise was an explicit required diagnostic criterion for participant inclusion in this study — not that PEM was studied, observed, or discussed. Studies using criteria that do not require PEM (e.g. Fukuda, Oxford) are tagged “PEM not required”. How the atlas works →
Spotted an error in this entry? Report it →