Acute Motor and Sensory Axonal Neuropathy (AMSAN) — Comprehensive Disease Characteristics Report
Target disease: Acute motor and sensory axonal neuropathy (AMSAN) (autoimmune; acute post-infectious immune-mediated peripheral neuropathy; axonal Guillain–Barré syndrome (GBS) variant). (shang2021axonalvariantsof pages 1-2)
High-level definition (current understanding): AMSAN is an axonal form of GBS with acute involvement of motor and sensory axons, typically presenting with rapidly progressive limb weakness plus sensory loss/paresthesia and areflexia/hyporeflexia, often after an infectious trigger. (shang2021axonalvariantsof pages 1-2, leonhard2024guillain–barrésyndrome pages 1-3)
Key abstract-quoted definition (GBS umbrella): Nature Reviews Disease Primers (published 2024-12-19) states: “Guillain–Barré syndrome (GBS) is a rare immune-mediated polyradiculoneuropathy” and notes that “Diagnosis is based on clinical features, supported by cerebrospinal fluid analysis and nerve conduction studies.” (leonhard2024guillain–barrésyndrome pages 1-3)
1. Disease Information
1.1 Overview
AMSAN is a GBS subtype within “axonal variants” (primarily AMAN and AMSAN). AMSAN differs from AMAN by having prominent sensory axonal involvement in addition to motor axonal injury. (shang2021axonalvariantsof pages 1-2)
1.2 Key identifiers / ontology mappings (availability in retrieved sources)
The retrieved literature focused on GBS and axonal variants but did not provide a specific MONDO ID or Orphanet code for AMSAN.
ICD (from real-world claims-based definitions for GBS): - GBS was defined using ICD-9 357.0 and ICD-10 G61.0, G65.0 in a US prescribing-patterns study. (stino2024intravenousimmunoglobulinand pages 1-2)
MeSH / MONDO / Orphanet / OMIM: not explicitly stated in the retrieved texts; thus not reliably reportable here.
1.3 Synonyms / alternative names
- “Acute motor-sensory axonal polyneuropathy” (used as a synonym in case literature). (geng2023acutemotorsensoryaxonal pages 3-5)
- “Axonal Guillain–Barré syndrome” (umbrella term encompassing AMAN/AMSAN). (umar2024complexneurologicalsequelae pages 4-6, shang2021axonalvariantsof pages 1-2)
1.4 Evidence source type
Most disease-level statements here are derived from aggregated disease resources and reviews (e.g., Nature Reviews Disease Primers; axonal GBS update review; Campylobacter–ganglioside review), supplemented by human clinical case reports illustrating AMSAN phenotypes/triggers and treatment response. (leonhard2024guillain–barrésyndrome pages 1-3, shang2021axonalvariantsof pages 1-2, latov2022campylobacterjejuniinfection pages 1-2, geng2023acutemotorsensoryaxonal pages 3-5)
2. Etiology
2.1 Primary causal factors (mechanistic etiology)
Post-infectious autoimmunity via molecular mimicry is the leading paradigm for axonal GBS/AMSAN, particularly in Campylobacter jejuni–associated disease. (shang2021axonalvariantsof pages 1-2, latov2022campylobacterjejuniinfection pages 1-2, leonhard2024guillain–barrésyndrome pages 1-3)
Abstract quote (Campylobacter–GBS link; published 2022-10-28): Latov writes: “Preceding infection with Campylobacter jejuni (Cj) occurs in approximately 30% of patients with Guillain–Barre syndrome (GBS), and the risk of GBS following Cj infection is increased by 77 to 100-fold. GBS is most often of the axonal subtype and is thought to be mediated by IgG antibodies to peripheral nerve gangliosides … induced by molecular mimicry.” (latov2022campylobacterjejuniinfection pages 1-2)
2.2 Risk factors
Infectious triggers (human clinical + epidemiologic evidence): - Campylobacter jejuni enteritis: strong epidemiologic association and mechanistic evidence via ganglioside mimicry. (latov2022campylobacterjejuniinfection pages 1-2, leonhard2024guillain–barrésyndrome pages 1-3) - Viral and other infectious triggers reported for axonal variants include Zika and other pathogens in review summaries; case literature also reports post–COVID-19 AMSAN. (shang2021axonalvariantsof pages 1-2, geng2023acutemotorsensoryaxonal pages 3-5)
Timing after diarrheal illness: in C. jejuni–associated GBS, neurological symptoms “usually begin at 10 days to 3 weeks after the onset of diarrhea.” (latov2022campylobacterjejuniinfection pages 1-2)
COVID-19 association (case-level, mechanistic hypotheses): AMSAN has been described following SARS-CoV-2 infection, with proposed mechanisms including molecular mimicry and hyperinflammatory para-infectious immune injury; anti-ganglioside antibodies may be absent in some cases. (geng2023acutemotorsensoryaxonal pages 3-5, geng2023acutemotorsensoryaxonal pages 5-6)
2.3 Protective factors
No specific protective genetic variants, environmental protective factors, or proven preventive interventions for AMSAN were identified in the retrieved sources.
2.4 Gene–environment interactions
The retrieved sources emphasize infection-triggered autoimmunity and mention “host genetic predisposition” as an important research direction in GBS broadly, but do not provide validated AMSAN-specific gene–environment interaction loci. (shang2021axonalvariantsof pages 1-2)
3. Phenotypes (clinical features)
3.1 Core phenotype spectrum (suggested HPO terms)
AMSAN typically includes: - Acute/subacute limb weakness (often symmetric), progressing over days (HP:0001324 Muscle weakness; HP:0003674 Motor delay/impairment not specific; consider HP:0003323 Progressive muscular weakness). - Areflexia/hyporeflexia (HP:0001284 Areflexia). (leonhard2024guillain–barrésyndrome pages 1-3) - Sensory symptoms (paresthesia, sensory loss) (HP:0003401 Paresthesia; HP:0000763 Sensory neuropathy). (leonhard2024guillain–barrésyndrome pages 1-3, geng2023acutemotorsensoryaxonal pages 3-5) - Pain (HP:0012531 Pain). (leonhard2024guillain–barrésyndrome pages 1-3) - Cranial nerve involvement may occur in severe GBS phenotypes (facial palsy, bulbar weakness) (HP:0001343 Facial palsy; HP:0002493 Dysphagia). (leonhard2024guillain–barrésyndrome pages 1-3) - Autonomic dysfunction in severe cases (HP:0001278 Orthostatic hypotension; HP:0002013 Vomiting; broader: dysautonomia). (busl2023guidelinesforneuroprognostication pages 1-3, umar2024complexneurologicalsequelae pages 4-6) - Respiratory failure / need for ventilation in severe cases (HP:0002878 Respiratory failure; HP:0002094 Dyspnea). (leonhard2024guillain–barrésyndrome pages 1-3)
3.2 Onset and progression
GBS (including AMSAN) is characterized by rapid progression with a typical nadir within weeks. Neurocritical Care guidelines note symptoms reach maximum “within 2–4 weeks.” (busl2023guidelinesforneuroprognostication pages 1-3)
3.3 Frequency among affected individuals (data availability)
Phenotype frequencies are best described for GBS overall rather than AMSAN specifically in the retrieved sources: - “Around 20% of patients may develop weakness in all four limbs … and respiratory failure requiring mechanical ventilation.” (leonhard2024guillain–barrésyndrome pages 1-3)
3.4 Quality-of-life impact
Nature Reviews Disease Primers emphasizes residual disability: “~20% of patients who received treatment are unable to walk after 6 months.” (leonhard2024guillain–barrésyndrome pages 1-3)
4. Genetic/Molecular Information
4.1 Causal genes
AMSAN is not a monogenic disorder in standard clinical framing; the retrieved sources do not identify causal genes or OMIM disease entries specific to AMSAN. (leonhard2024guillain–barrésyndrome pages 1-3, shang2021axonalvariantsof pages 1-2)
4.2 Key molecular targets (autoantigens)
Gangliosides on peripheral nerves are key immune targets in axonal GBS/AMSAN: - Anti-ganglioside antibodies reported in association with AMSAN include anti-GM1, anti-GM1b, anti-GD1a. (shang2021axonalvariantsof pages 6-7)
4.3 Pathogenic “variants” (not applicable)
Pathogenic DNA variants are not established as causal for AMSAN in the provided evidence.
4.4 Epigenetics / chromosomal abnormalities
Not established for AMSAN in the retrieved sources.
5. Environmental Information
5.1 Infectious agents (key environmental triggers)
- Campylobacter jejuni is the best-supported trigger for axonal GBS/AMSAN. (latov2022campylobacterjejuniinfection pages 1-2, leonhard2024guillain–barrésyndrome pages 1-3)
- SARS-CoV-2 has been associated with AMSAN in case literature, with immune-mediated mechanisms proposed. (geng2023acutemotorsensoryaxonal pages 3-5, geng2023acutemotorsensoryaxonal pages 5-6)
5.2 Lifestyle/occupational factors
No AMSAN-specific lifestyle protective/risk factors were established in the retrieved sources.
6. Mechanism / Pathophysiology
6.1 Causal chain (upstream → downstream)
Upstream trigger: infection (especially C. jejuni; also viral triggers). (latov2022campylobacterjejuniinfection pages 1-2, leonhard2024guillain–barrésyndrome pages 1-3)
Immune priming via molecular mimicry: bacterial lipooligosaccharides mimic peripheral nerve gangliosides, producing cross-reactive antibodies. Nature Reviews Disease Primers explicitly summarizes: “For example, in patients with preceding Campylobacter jejuni infection, molecular mimicry causes a cross-reactive antibody response to nerve gangliosides.” (leonhard2024guillain–barrésyndrome pages 1-3)
Effector injury: anti-ganglioside antibodies activate complement at nodes/paranodes and axolemma, causing conduction failure and structural axonal injury/degeneration (axonal variants). (leonhard2024guillain–barrésyndrome pages 5-7, latov2022campylobacterjejuniinfection pages 2-4)
Downstream clinical manifestations: reduced compound muscle action potentials (CMAPs), sensory nerve action potential (SNAP) abnormalities, weakness + sensory loss, and in severe cases bulbar/respiratory/autonomic failure. (geng2023acutemotorsensoryaxonal pages 3-5, leonhard2024guillain–barrésyndrome pages 1-3)
6.2 Immune system involvement
- Axonal variants are associated with anti-ganglioside antibodies and complement-dependent mechanisms; Latov describes that GBS axonal subtype is “thought to be mediated by IgG antibodies to peripheral nerve gangliosides” cross-reactive with C. jejuni components. (latov2022campylobacterjejuniinfection pages 1-2)
6.3 Suggested GO biological process terms (mechanism-oriented)
- GO:0006956 complement activation
- GO:0006955 immune response
- GO:0002250 adaptive immune response
- GO:0042113 B cell activation
- GO:0007166 cell surface receptor signaling pathway (broad)
6.4 Suggested Cell Ontology terms (CL)
- CL:0000945 B cell
- CL:0000084 T cell
- CL:0000235 macrophage
- CL:0000584 Schwann cell (peripheral glia; mechanistic relevance to peripheral nerves broadly)
6.5 Molecular profiling / biomarkers (availability)
The retrieved sources highlight a lack of specific biomarkers for GBS broadly (including axonal variants). (leonhard2024guillain–barrésyndrome pages 1-3)
7. Anatomical Structures Affected
7.1 Organ/system level
- Peripheral nervous system (peripheral nerves and roots; polyradiculoneuropathy). (leonhard2024guillain–barrésyndrome pages 1-3)
7.2 Tissue/cell level (suggested UBERON terms)
- UBERON:0000010 peripheral nerve
- UBERON:0001021 spinal nerve root
7.3 Subcellular (suggested GO Cellular Component)
- GO:0033267 axon part
- GO:0043209 myelin sheath (even in “axonal” variants, nerve architecture is involved)
- GO:0030054 cell junction (node/paranode microdomains; mechanistic target region) (leonhard2024guillain–barrésyndrome pages 5-7)
8. Temporal Development
8.1 Onset pattern
Acute onset with rapid progression; nadir typically within 2–4 weeks in GBS overall. (busl2023guidelinesforneuroprognostication pages 1-3)
8.2 Course
Typically monophasic: Nature Reviews Disease Primers states “GBS is usually a monophasic disease.” (leonhard2024guillain–barrésyndrome pages 1-3)
9. Inheritance and Population
9.1 Epidemiology
Data are primarily for GBS overall; AMSAN-specific incidence is not provided in the retrieved evidence.
- GBS annual global incidence “1–2 per 100,000 persons per year.” (leonhard2024guillain–barrésyndrome pages 1-3)
- Axonal-variants review provides a similar range: 0.81–1.89 per 100,000/year. (shang2021axonalvariantsof pages 1-2)
- Sex/age: males affected ~1.5× more than females; risk rises ~20% per decade of age. (leonhard2024guillain–barrésyndrome pages 1-3)
9.2 Population differences (axonal variants)
Axonal variants (including AMSAN) are discussed as having geographic variability, with higher representation in some regions (review-level). (restrepojimenez2018theimmunotherapyof pages 46-47)
10. Diagnostics
10.1 Diagnostic approach (real-world implementation)
GBS diagnosis is “based on clinical features, supported by cerebrospinal fluid analysis and nerve conduction studies.” (leonhard2024guillain–barrésyndrome pages 1-3)
CSF: - Axonal-variants review: CSF albuminocytologic dissociation is a hallmark “detectable in almost 90%,” with CSF albumin rising from week 2 and present in ~70% by the end of week 2. (shang2021axonalvariantsof pages 1-2)
Electrophysiology (NCS/EMG): - Axonal variants: early studies can be misleading; decreased CMAP amplitudes and reversible conduction failure/block can appear early; electrophysiology “more reliable” at 3–6 weeks than at 1–2 weeks. (shang2021axonalvariantsof pages 1-2) - Nature Reviews Disease Primers emphasizes heterogeneity: mixed axonal–demyelinating or even normal NCS can occur, limiting strict NCS-only subclassification. (leonhard2024guillain–barrésyndrome pages 4-5)
Serology (supportive, not required for all): Anti-ganglioside antibodies support axonal subtype classification (anti-GM1/anti-GD1a and related), but seronegative axonal cases exist. (shang2021axonalvariantsof pages 6-7, geng2023acutemotorsensoryaxonal pages 5-6)
10.2 Differential diagnosis (high-level)
- Acute onset CIDP (A-CIDP) is clinically challenging and can lead to reclassification; this carries therapeutic implications. (stino2024intravenousimmunoglobulinand pages 1-2)
11. Outcome / Prognosis
11.1 Key outcome statistics (GBS overall)
Nature Reviews Disease Primers reports: “~20% of patients who received treatment are unable to walk after 6 months and ~5% die as a consequence of GBS.” (leonhard2024guillain–barrésyndrome pages 1-3)
Neurocritical Care neuroprognostication guidelines provide ICU-relevant statistics: - “10–30% require mechanical ventilation during the acute phase.” (busl2023guidelinesforneuroprognostication pages 1-3) - Mortality “range between 1 and 13%,” with “mortality rates up to 20%” among ventilated patients. (busl2023guidelinesforneuroprognostication pages 1-3)
11.2 Prognostic tools / expert consensus
Busl et al. recommend: - EGRIS (Erasmus GBS Respiratory Insufficiency Score) for predicting ventilation, and - EGOS / modified EGOS for predicting independent ambulation at 3 months and beyond. (busl2023guidelinesforneuroprognostication pages 1-3)
12. Treatment
12.1 Standard of care
Only proven effective disease-modifying treatments for GBS (including AMSAN) remain: - Intravenous immunoglobulin (IVIg) - Plasma exchange (PE/PLEX) (leonhard2024guillain–barrésyndrome pages 1-3)
Nature Reviews Disease Primers (2024) abstract quote: “Effective treatments include plasma exchange and intravenous immunoglobulins.” (leonhard2024guillain–barrésyndrome pages 1-3)
12.2 Treatment strategy and common pitfalls (guidelines + evidence)
A US real-world analysis emphasizes trials showing no benefit from: - Repeat IVIG dosing and - PLEX followed by IVIG (combination therapy) in non-responders. (stino2024intravenousimmunoglobulinand pages 1-2)
Abstract quote (real-world utilization; published 2024-09): Stino et al. state: “Randomized controlled trials show that repeat IVIG dosing and … combination therapy have no additional therapeutic benefit in Guillain-Barre Syndrome (GBS) non-responders.” (stino2024intravenousimmunoglobulinand pages 1-2)
12.3 Recent developments (2023–2024) — complement inhibition (eculizumab)
A key 2024 development is a phase 3 randomized trial of eculizumab (C5 inhibitor) added to IVIg in severe GBS.
Abstract quote (published 2024-07; J Peripher Nerv Syst): “This study evaluated the efficacy and safety of eculizumab add-on therapy to IVIg … in patients with severe GBS.” (kuwabara2024efficacyandsafety pages 1-2)
Results: - Primary endpoint not met (time to Hughes FG ≤1): HR 0.9, 95% CI 0.45–1.97; p = 0.89. (kuwabara2024efficacyandsafety pages 1-2) - Strong target engagement: serum free C5 reduced by 99.99% at 1 hour postdose and sustained to week 5. (kuwabara2024efficacyandsafety pages 1-2)
12.4 MAXO (Medical Action Ontology) suggestions
- MAXO:0000412 intravenous immunoglobulin therapy
- MAXO:0000756 therapeutic plasma exchange
- MAXO:0000610 mechanical ventilation (for respiratory failure)
- MAXO:0000571 physical therapy / rehabilitation (supportive)
13. Prevention
No established primary-prevention intervention is specific to AMSAN beyond prevention/management of infectious triggers at the population level.
Vaccine-associated GBS (broader context): The retrieved evidence supports ongoing pharmacovigilance and risk assessment for GBS after vaccination, but does not provide AMSAN-specific prevention guidance. (shang2021axonalvariantsof pages 1-2)
14. Other Species / Natural Disease
Direct naturally occurring AMSAN analogs in non-human species were not identified in the retrieved sources.
15. Model Organisms
Experimental autoimmune neuritis and anti-ganglioside models (mechanistic relevance): Latov reports animal models in which rabbits immunized with GM1 or C. jejuni LPS develop acute axonal neuropathy with anti-GM1 antibodies, supporting the antibody-mediated mechanism relevant to axonal GBS/AMSAN. (latov2022campylobacterjejuniinfection pages 2-4)
2023–2024 “latest research” highlights (prioritized)
- 2024 authoritative synthesis: Nature Reviews Disease Primers (Leonhard et al.; 2024-12-19) consolidates contemporary consensus on GBS triggers, diagnosis (CSF + NCS), treatment (IVIg/PE), and residual disability (20% non-ambulant at 6 months; ~5% mortality). (leonhard2024guillain–barrésyndrome pages 1-3)
- 2024 mechanism-directed therapy trial: Phase 3 add-on eculizumab to IVIg did not improve functional recovery despite robust complement suppression, suggesting complement blockade alone is insufficient or that patient selection/timing remain unresolved. (kuwabara2024efficacyandsafety pages 1-2)
- 2024 real-world implementation gap: A US claims-based cohort (2001–2018) found repeat IVIG use (39.7%) and combination therapy (6.1%) persisted, despite RCT evidence against these approaches in non-responders; diagnostic reclassification to CIDP occurred in 32%. (stino2024intravenousimmunoglobulinand pages 1-2)
Evidence summary table
Table (click to expand)
| Domain | Evidence summary | Key quantitative stats (with values) | Primary source (first author, year, journal) | PMID if available | URL | Context citation ID |
|---|---|---|---|---|---|---|
| Definition | AMSAN is an axonal Guillain-Barré syndrome (GBS) subtype characterized by acute motor and sensory axonal involvement; axonal GBS variants include AMAN and AMSAN. GBS is an acute, immune-mediated polyradiculoneuropathy with rapidly progressive weakness and sensory deficits. | Global GBS incidence: 1–2/100,000/year; males affected ~1.5× more often; risk rises ~20% per decade of age. | Leonhard, 2024, Nature Reviews Disease Primers | https://doi.org/10.1038/s41572-024-00580-4 | (leonhard2024guillain–barrésyndrome pages 1-3, shang2021axonalvariantsof pages 1-2) | |
| Triggers | AMSAN is usually post-infectious, with Campylobacter jejuni the best-supported trigger; COVID-19, chikungunya, and other infections have also been reported as antecedents in axonal GBS/AMSAN cases. Molecular mimicry between microbial glycans and nerve gangliosides is the leading mechanism. | Preceding C. jejuni in ~30% of GBS; GBS risk after C. jejuni infection increased 77–100-fold; neurologic symptoms usually begin 10 days to 3 weeks after diarrhea. | Latov, 2022, Microorganisms | https://doi.org/10.3390/microorganisms10112139 | (latov2022campylobacterjejuniinfection pages 1-2, latov2022campylobacterjejuniinfection pages 2-4, geng2023acutemotorsensoryaxonal pages 3-5) | |
| Autoantibodies | Axonal GBS including AMSAN is associated most often with anti-ganglioside antibodies, particularly anti-GM1, anti-GM1b, and anti-GD1a. Antibodies are often IgG1/IgG3 subclasses and can cross-react with C. jejuni lipooligosaccharides. | Anti-ganglioside antibodies reported in 41–85% of GBS following C. jejuni infection. | Shang, 2021, Journal of Neurology | https://doi.org/10.1007/s00415-020-09742-2 | (shang2021axonalvariantsof pages 6-7, latov2022campylobacterjejuniinfection pages 2-4, latov2022campylobacterjejuniinfection pages 1-2) | |
| Pathophysiology | The best-supported causal chain is infection → molecular mimicry → anti-ganglioside antibody generation → complement activation at nodes/paranodes/axolemma → conduction failure and axonal degeneration. Pathology in axonal GBS shows antibody/complement deposition on axolemma and macrophage-associated axonal injury. | Serum C5 in the eculizumab phase 3 trial was reduced by 99.99% 1 hour post-dose and remained suppressed through week 5, showing effective target engagement. | Latov, 2022, Microorganisms | https://doi.org/10.3390/microorganisms10112139 | (latov2022campylobacterjejuniinfection pages 2-4, leonhard2024guillain–barrésyndrome pages 5-7, kuwabara2024efficacyandsafety pages 1-2) | |
| Diagnostics | Diagnosis is primarily clinical and supported by CSF and electrophysiology. For axonal variants, serial NCS/EMG are important because early studies may show reduced CMAPs, reversible conduction failure/block, or equivocal findings; CSF albuminocytologic dissociation is common but may lag. | CSF albuminocytologic dissociation in almost 90%; CSF protein elevated in ~70% by end of week 2; electrophysiology more reliable at 3–6 weeks than 1–2 weeks. | Shang, 2021, Journal of Neurology | https://doi.org/10.1007/s00415-020-09742-2 | (shang2021axonalvariantsof pages 1-2, busl2023guidelinesforneuroprognostication pages 1-3, leonhard2024guillain–barrésyndrome pages 1-3) | |
| Prognosis | Axonal GBS/AMSAN generally has a more severe course and slower recovery than demyelinating GBS. Across GBS, respiratory failure, bulbar weakness, and severe nadir disability are major poor prognostic features; EGOS and EGRIS are used for outcome and ventilation risk prediction. | 10–30% require mechanical ventilation; ~20% of treated GBS patients cannot walk at 6 months; ~5% die; mortality can reach up to 20% among ventilated patients. | Busl, 2023, Neurocritical Care | https://doi.org/10.1007/s12028-023-01707-3 | (busl2023guidelinesforneuroprognostication pages 1-3, leonhard2024guillain–barrésyndrome pages 1-3, umar2024complexneurologicalsequelae pages 4-6) | |
| Treatment | Standard evidence-based treatment remains IVIG or plasma exchange; combination therapy and repeat IVIG do not add benefit and can increase adverse events. Supportive ICU care and rehabilitation remain essential, especially in severe axonal cases. | Median time to walk without aid: 51 days with IVIG, 49 days with plasma exchange, 40 days with combined treatment in older trial data; repeat IVIG used in 39.7% and combination therapy in 6.1% of a US real-world cohort before newer evidence/guidelines. | Kuwabara, 2024, Journal of the Peripheral Nervous System | https://doi.org/10.1111/jns.12646 | (kuwabara2024efficacyandsafety pages 1-2, stino2024intravenousimmunoglobulinand pages 1-2) | |
| Recent developments 2023-2024 | Recent work emphasized 2023 EAN/PNS guideline-based care and mechanism-directed therapy. A 2024 phase 3 trial of eculizumab added to IVIG in severe GBS did not meet its primary endpoint despite strong complement suppression and acceptable safety. | Phase 3 eculizumab trial enrolled 57 participants (37 eculizumab, 20 placebo); primary endpoint HR 0.9, 95% CI 0.45–1.97, p=.89. | Kuwabara, 2024, Journal of the Peripheral Nervous System | https://doi.org/10.1111/jns.12646 | (kuwabara2024efficacyandsafety pages 1-2, freiha2026guillainbarrésyndromeprogress pages 7-9) | |
| Real-world implementation | Real-world US prescribing data show persistent use of non-recommended repeat IVIG and some IVIG/PLEX combination therapy, suggesting a gap between evidence/guidelines and practice. Diagnostic reclassification from GBS to CIDP also occurs frequently in claims-based care pathways. | US cohort n=2325; repeat IVIG 39.7%; combination therapy 6.1%; later reclassified to CIDP 32.0%. | Stino, 2024, Muscle & Nerve | https://doi.org/10.1002/mus.28265 | (stino2024intravenousimmunoglobulinand pages 1-2) |
Table: This table condenses the most supported AMSAN findings from the available context into disease knowledge base fields. It highlights what is known specifically for axonal GBS/AMSAN and where evidence comes from broader GBS literature used to inform AMSAN care.
Limitations of this report (evidence availability constraints)
- AMSAN-specific ontology identifiers (MONDO, Orphanet, OMIM, MeSH term strings) were not available in the retrieved full-text excerpts and therefore are not asserted here.
- Many epidemiologic and prognosis statistics are reported at the GBS umbrella level; AMSAN-specific incidence, subtype-specific mortality, and antibody-frequency distributions require additional targeted cohort studies not captured in the retrieved evidence subset.
References
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(shang2021axonalvariantsof pages 1-2): Pei Shang, Mingqin Zhu, Ying Wang, Xiang-yu Zheng, Xiujuan Wu, Jie Zhu, Jiachun Feng, and Hong-Liang Zhang. Axonal variants of guillain–barré syndrome: an update. Journal of Neurology, pages 1-18, Mar 2021. URL: https://doi.org/10.1007/s00415-020-09742-2, doi:10.1007/s00415-020-09742-2. This article has 93 citations and is from a domain leading peer-reviewed journal.
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(leonhard2024guillain–barrésyndrome pages 1-3): Sonja E. Leonhard, Nowshin Papri, Luis Querol, Simon Rinaldi, Nortina Shahrizaila, and Bart C. Jacobs. Guillain–barré syndrome. Nature Reviews Disease Primers, Dec 2024. URL: https://doi.org/10.1038/s41572-024-00580-4, doi:10.1038/s41572-024-00580-4. This article has 48 citations.
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(stino2024intravenousimmunoglobulinand pages 1-2): Amro M. Stino, Evan L. Reynolds, Maya Watanabe, and Brian C. Callaghan. Intravenous immunoglobulin and plasma exchange prescribing patterns for guillain‐barre syndrome in the united states—2001 to 2018. Muscle & Nerve, 70:1192-1199, Sep 2024. URL: https://doi.org/10.1002/mus.28265, doi:10.1002/mus.28265. This article has 3 citations and is from a peer-reviewed journal.
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(geng2023acutemotorsensoryaxonal pages 3-5): Na Geng, Pengfei Wang, and Yong Zhang. Acute motor-sensory axonal polyneuropathy variant of guillain-barré syndrome with a thalamic lesion and covid-19: a case report and discussion on mechanism. Frontiers in Neurology, Sep 2023. URL: https://doi.org/10.3389/fneur.2023.1227505, doi:10.3389/fneur.2023.1227505. This article has 6 citations and is from a peer-reviewed journal.
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(umar2024complexneurologicalsequelae pages 4-6): Anam Umar, Amber E Faquih, Bilal Jawed, and Muhammad Bilal. Complex neurological sequelae: axonal guillain-barré syndrome post covid-19 in a young patient. Cureus, Aug 2024. URL: https://doi.org/10.7759/cureus.67213, doi:10.7759/cureus.67213. This article has 0 citations.
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(latov2022campylobacterjejuniinfection pages 1-2): Norman Latov. Campylobacter jejuni infection, anti-ganglioside antibodies, and neuropathy. Microorganisms, 10:2139, Oct 2022. URL: https://doi.org/10.3390/microorganisms10112139, doi:10.3390/microorganisms10112139. This article has 25 citations.
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(geng2023acutemotorsensoryaxonal pages 5-6): Na Geng, Pengfei Wang, and Yong Zhang. Acute motor-sensory axonal polyneuropathy variant of guillain-barré syndrome with a thalamic lesion and covid-19: a case report and discussion on mechanism. Frontiers in Neurology, Sep 2023. URL: https://doi.org/10.3389/fneur.2023.1227505, doi:10.3389/fneur.2023.1227505. This article has 6 citations and is from a peer-reviewed journal.
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