Review of Hepatitis E Virus Associated Neurological Injury SyndromesHepatitis E virus may be linked to several rare neurological conditions

Frontiers in Medicine Published April 22, 2026 DOI ↗ Editorial oversight: Dr. Amelia Tan, PhD · Internal Medicine & Chronic Disease

AI-generated summary of the cited source, checked by automated accuracy review. How we work

Key Takeaway

Note that HEV-associated neurological injury is described, though specific outcome data and sample sizes are unreported.

This publication is classified as a review focusing on neurological manifestations linked to Hepatitis E virus (HEV) infection. The scope encompasses several distinct neurological conditions identified in the source material, including Hepatitis E virus-associated neurological injury, Guillain–Barré syndrome, neuralgic amyotrophy, encephalitis, and myelitis. The authors aim to synthesize available information regarding these associations rather than presenting new primary trial data.

The source does not report specific main results, primary outcomes, or secondary outcomes. Consequently, no pooled effect sizes, confidence intervals, or p-values are available for synthesis. The population, sample size, setting, and follow-up duration are also not reported within the provided documentation. Without these quantitative details, the magnitude of the association remains undefined in this summary.

Safety data, including adverse events, serious adverse events, discontinuations, and tolerability, are not reported. The authors do not explicitly list limitations or funding sources in the provided metadata. The certainty of the evidence and causality notes are also not reported, preventing a definitive assessment of the strength of the link between HEV and the listed neurological conditions.

Practice relevance is not reported, limiting the ability to derive specific clinical recommendations from this review alone. Clinicians should recognize that while the conditions are listed, the evidence base described lacks the numerical grounding necessary for robust decision-making. Further primary research or systematic reviews with reported data would be required to establish clear management guidelines.

This review looked at whether the Hepatitis E virus (HEV) is connected to various neurological problems. The conditions examined included Hepatitis E virus-associated neurological injury, Guillain–Barré syndrome, neuralgic amyotrophy, encephalitis, and myelitis. However, the input data did not report the specific number of people studied, the setting of the research, or the main results found. Because these details are missing, it is unclear how strong the evidence is for any connection between the virus and these illnesses.

No safety concerns, adverse events, or tolerability issues were reported in the provided information. Since the study population, sample size, and outcomes were not reported, readers cannot determine who might be at risk or how common these complications are. The review itself does not provide enough data to say if the virus causes these conditions or if they happen by chance.

Readers should understand that this information is limited and does not change current medical practice. If you have Hepatitis E or worry about neurological symptoms, talk to your doctor about your specific situation rather than relying on this incomplete review.

What this means for you:

A review suggests a possible link between Hepatitis E virus and rare neurological conditions, but evidence is limited and unclear.

Study Details

Study typeSystematic review

EvidenceLevel 1

PublishedApr 2026

View Original Abstract ↓

Hepatitis E virus (HEV) is increasingly recognized as a cause of neurological disease beyond its hepatic manifestations. Neurological complications are the most frequently reported extrahepatic presentations and include both peripheral nervous system disorders, such as Guillain–Barré syndrome (GBS) and neuralgic amyotrophy (NA), and central nervous system (CNS) involvement, including encephalitis and myelitis, often in the absence of overt hepatitis. This review summarizes the clinical spectrum of HEV-associated neurological disease and integrates evidence from human studies and experimental models. Current evidence supports multifactorial pathogenesis, with direct viral neuroinvasion of the CNS and immune-mediated mechanisms predominating in peripheral neuropathies. Experimental in vivo and in vitro systems demonstrate that HEV can cross the blood–brain barrier (BBB) and replicate within neural tissues, providing biological plausibility for CNS involvement. By synthesizing clinical and experimental findings, this review highlights the dual pathogenic pathways underlying HEV-associated neurological injury and outlines key unresolved questions relevant to diagnosis, pathogenesis, and clinical management.

Review of Hepatitis E Virus Associated Neurological Injury SyndromesHepatitis E virus may be linked to several rare neurological conditions

Study Details

Intrawound tobramycin plus vancomycin did not reduce deep infection risk compared with vancomycin alone in high-risk tibial fractures

Adding Antibiotics to Bone Surgery Didn't Lower Infection Risk

Clinical research that matters. Delivered to your inbox.

Review of Hepatitis E Virus Associated Neurological Injury SyndromesHepatitis E virus may be linked to several rare neurological conditions

More on Encephalitis

Study Details

Intrawound tobramycin plus vancomycin did not reduce deep infection risk compared with vancomycin alone in high-risk tibial fractures

Adding Antibiotics to Bone Surgery Didn't Lower Infection Risk

Clinical research that matters. Delivered to your inbox.

Related in Infectious Disease

From Other Specialties