Evidence map›Paper›PMID 40116573›Full record

SynthesisEuropean journal of neurology2025

Retrograde Amnesia in LGI1 and CASPR2 Limbic Encephalitis: Two Case Reports and a Systematic Literature Review.

Malvaso Antonio, Denise Cerne, Bernini Sara, Bottiroli Sara, Marchioni Enrico, Businaro Pietro, Masciocchi Stefano, Morandi Chiara, Scaranzin Silvia, Emanuela Maria Mobilia and 4 more

Abstract readSystematic ReviewCase Reports
In one paragraph

Synthesis in European journal of neurology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

9 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Beyond memories: A narrative review on the role of amygdalo-hippocampal complex in social cognition.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2026
    Review
  3. Review
  4. Article
  5. Review
  6. Review
  7. Review
  8. Article
  9. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

14 authors.

Malvaso AntonioDepartment of Brain and Behavioral Sciences, University of Pavia, Pavia, Italy.ORCID 0000-0001-9691-0890
Denise CerneDepartment of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (DINOGMI), University of Genoa, Genoa, Italy.ORCID 0009-0003-5411-1187
Bernini SaraCognitive Psychology Research Section, IRCCS Mondino Foundation, Pavia, Italy.
Bottiroli SaraDepartment of Brain and Behavioral Sciences, University of Pavia, Pavia, Italy.
Marchioni EnricoNeurooncology and Neuroinflammation Unit, IRCCS Mondino Foundation, Pavia, Italy.
Businaro PietroDepartment of Brain and Behavioral Sciences, University of Pavia, Pavia, Italy.
Masciocchi StefanoDepartment of Brain and Behavioral Sciences, University of Pavia, Pavia, Italy.
Morandi ChiaraNeuroimmunology Research Section, IRCCS Mondino Foundation, Pavia, Italy.
Scaranzin SilviaNeuroimmunology Research Section, IRCCS Mondino Foundation, Pavia, Italy.
Emanuela Maria MobiliaScuola Universitaria Superiore IUSS Pavia, Pavia, Italy.
Stefano F CappaScuola Universitaria Superiore IUSS Pavia, Pavia, Italy.ORCID 0000-0003-1003-3925
Benedetti LuanaIRCCS Ospedale Policlinico San Martino, Genoa, Italy.
Franciotta DiegoUOM, Laboratory of Clinical Pathology, APSS, Santa Chiara Hospital, Trento, Italy.
Matteo GastaldiNeuroimmunology Research Section, IRCCS Mondino Foundation, Pavia, Italy.ORCID 0000-0003-2288-2000

Funding

Italian Ministry of Health, "Ricerca Corrente 2022-2024"Ricerca corrente grant from the Italian Ministry of Health to the IRCCS Mondino Foundation
6 · The paper itself

Abstract

backgroundBoth anterograde and retrograde amnesia can typically co-occur in limbic autoimmune encephalitis (LAE), including the forms associated with antibodies to CASPR2/LGI1, two protein complexed with the voltage-gated potassium channel (VGKC). However, isolated retrograde amnesia is very rare, and it has never been described in LAE.

methodsWe report two patients with CASPR2 LAE who showed isolated retrograde amnesia, without other significant cognitive impairments. A systematic literature review was performed in accordance with the PRISMA guidelines on patients with LAE, antibodies to the VGKC complex (including LGI1, CASPR2, or the VGKC), and memory impairment.

resultsWe identified 467 patients from 29 studies. Fourteen/467 had retrograde amnesia (2.9%), which co-occurred with anterograde amnesia in 12 with VGKC antibodies (7 with LGI1 LAE-like clinical phenotypes). Our two cases with CASPR2 LAE (2/469, 0.4%) were the only ones with isolated retrograde amnesia, which was actively investigated in only 56/467 patients. Thirteen/14 patients, including the two with isolated retrograde amnesia, had partial or poor cognitive improvement.

conclusionsRetrograde amnesia is rare but likely under-recognized in VGKC-complex antibodies LAE and associates with poor recovery. When isolated, it adds to the spectrum of CASPR2 LAE. These findings promote insights into retrograde amnesia pathophysiology, deserving investigation across the whole spectrum of AE.

Indexed as

Amnesia, RetrogradeAutoimmune DiseasesLimbic EncephalitisMembrane ProteinsNerve Tissue ProteinsAutoantibodiesHumansIntracellular Signaling Peptides and ProteinsPotassium Channels, Voltage-GatedAutoantibodiesCNTNAP2 protein, humanIntracellular Signaling Peptides and ProteinsLGI1 protein, humanMembrane ProteinsNerve Tissue ProteinsPotassium Channels, Voltage-Gatedautoimmune encephalitisCASPR2 encephalitisLGI1 encephalitisretrograde amnesiaVGKC encephalitis

Identifiers

PMID40116573
PMCPMC11927019

What Socratic holds

Textmetadata
LicenceCC BY-NC
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.