Neurological disorders associated with celiac disease
Celiac disease is associated with a spectrum of neurologic disorders, with the strongest evidence supporting associations for cerebellar ataxia (“gluten ataxia”), peripheral neuropathy, epilepsy/seizures, and headache syndromes. Evidence for most other neurologic manifestations is mainly limited to observational studies, case series, and biologic plausibility rather than large prospective causal data. [1]
Cerebellar ataxia (“gluten ataxia”)
Cerebellar ataxia is the best-described neurologic manifestation of celiac disease and is characterized clinically by progressive gait ataxia with additional cerebellar signs. [1]
Strength of evidence
- In a pediatric systematic review/meta-analysis, cerebellar ataxia was documented in 2.7% to 5.4% of participants in included studies, with additional studies showing no observed risk of cerebellar dysfunction, indicating inconsistent findings across studies. [2]
- Mechanistic evidence supporting immune-mediated neuroinflammation in gluten ataxia has been reported in neuropathologic/biologic studies, which supports plausibility but does not establish population-level causality. [3]
Peripheral neuropathy
Peripheral neuropathy is reported as a common neurologic manifestation of celiac disease and may occur with or without gastrointestinal symptoms. [1]
Strength of evidence
- In the pediatric systematic review/meta-analysis, an association between celiac disease and peripheral neuropathy was identified in only two studies, indicating limited quantitative evidence. [2]
- Reviews describe peripheral neuropathy as a consistent extra-intestinal manifestation of celiac disease, but the evidence base remains dominated by observational data and heterogeneity in neuropathy phenotypes and diagnostic approaches. [1]
Epilepsy / seizure disorders
Celiac disease is associated with epilepsy and seizures in both clinical series and epidemiologic studies. [1]
Strength of evidence
- In the pediatric systematic review/meta-analysis, the relative risk (RR) of epilepsy in individuals with celiac disease was 2.1, and the RR of celiac disease in individuals with epilepsy was 1.7. [2]
- In the same analysis, the risk difference was close to zero, which supported the interpretation that the observed association may be a chance association rather than a robust causal effect. [2]
Headache syndromes (including migraine)
Headache syndromes, including migraine-like presentations, have been reported with increased frequency in celiac disease. [1]
Strength of evidence
- In the pediatric systematic review/meta-analysis, headache showed an increased relative risk of 3.2 in celiac disease compared with comparison groups. [2]
- The evidence base remains largely observational, and headache ascertainment and diagnostic criteria vary across studies. [4]
Cognitive impairment and related neuropsychiatric symptoms
Celiac disease is associated in reviews with cognitive symptoms (often described as “brain fog”) and other neuropsychiatric manifestations. [1]
Strength of evidence
- Evidence is largely derived from clinical cohorts and narrative synthesis rather than large prospective, causal inference studies. [1]
- A pediatric systematic review/meta-analysis reported that an association between celiac disease and autism is disputed, reflecting uncertainty for some neurodevelopmental/psychiatric endpoints. [2]
Other proposed neurologic associations (weaker / less consistent evidence)
Reviews describe additional neurologic manifestations reported in association with celiac disease, including multifocal neurologic disorders such as multifocal leucoencephalopathy and cerebral calcifications, but consistent epidemiologic confirmation and effect-size estimates across rigorous studies are limited in the published literature reviewed here. [4]