E2 ModeratePreliminaryPEM not requiredCross-SectionalPeer-reviewedMachine draft
Dry eyes and mouth syndrome--a subgroup of patients presenting with sicca symptoms.
Price, E J, Venables, P J W · Rheumatology (Oxford, England) · 2002 · DOI
Quick Summary
This study looked at 34 patients who had dry eyes and dry mouth symptoms but did not meet the standard criteria for Sjögren's syndrome. These patients had many symptoms on questionnaires but few objective physical findings, and most of them also had features more typical of fibromyalgia or chronic fatigue syndrome rather than Sjögren's.
Why It Matters
This study is relevant to ME/CFS patients because it identifies a patient subgroup with high symptom burden but minimal objective findings—a pattern similar to ME/CFS—and demonstrates overlap between sicca symptoms, fibromyalgia, and chronic fatigue syndrome. Understanding these overlapping conditions may help clarify the pathophysiology and symptom relationships in ME/CFS.
Observed Findings
- 34 patients with dry eyes/mouth symptoms did not meet Sjögren's syndrome diagnostic criteria and were seronegative for anti-Ro and anti-La antibodies
- DEMS patients reported high symptom scores on visual analogue scales but demonstrated few objective clinical signs
- Salivary gland biopsy showed no excess atrophy in DEMS patients compared with SS and non-SS controls
- Most DEMS patients exhibited clinical features overlapping with fibromyalgia and/or chronic fatigue syndrome
- Antinuclear antibodies (ANA) were present in 19% of DEMS patients, higher than the general population
Inferred Conclusions
- DEMS represents a distinct clinical entity separate from primary or secondary Sjögren's syndrome
- DEMS exists on a disease spectrum more closely related to fibromyalgia and chronic fatigue syndrome than to classical autoimmune sicca disease
- High symptom burden in DEMS is not explained by objective tissue changes, serology, or subclinical SS
Remaining Questions
- What is the underlying pathophysiology of DEMS and its relationship to fibromyalgia and chronic fatigue syndrome?
- Do DEMS, fibromyalgia, and chronic fatigue syndrome share common etiological mechanisms or represent manifestations of the same condition?
What This Study Does Not Prove
This study does not prove that DEMS causes ME/CFS or vice versa, only that they can occur together in the same patient population. The cross-sectional design cannot establish causality or disease progression. It also does not determine whether DEMS represents a distinct disease entity or a manifestation of a broader syndrome.
Tags
Symptom:PainFatigue
Biomarker:Autoantibodies
Method Flag:Weak Case DefinitionSmall SampleExploratory Only
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 →
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