Evidence map›Paper›PMID 33483885›Full record

SynthesisNeurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology2021

Neuropathologic findings of patients with COVID-19: a systematic review.

Azalea T Pajo, Adrian I Espiritu, Almira Doreen Abigail O Apor, Roland Dominic G Jamora

Open access · bronzeAbstract readSystematic Review
In one paragraph

Synthesis in Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 56 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
56citing papers in PubMed, 1 pooled it
8.8field-weighted citation impact, top 2% of its field
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

56 citing papers in PubMed, 1 synthesis or guideline pooled it, 91 citations in OpenAlex.

  1. Characteristics of subarachnoid hemorrhage associated with COVID-19 infection: A systematic review and descriptive analysis.Journal of stroke and cerebrovascular diseases : the official journal of National Stroke Association · 2023
    Pooled it
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  15. Microglia at the blood brain barrier in health and disease.Frontiers in cellular neuroscience · 2024
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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

4 authors at 1 institution in 1 country.

Azalea T PajoDivision of Adult Neurology, Department of Neurosciences, College of Medicine-Philippine General Hospital, University of the Philippines Manila, Manila, Philippines.ORCID https://orcid.org/0000-0001-5726-0397
Adrian I EspirituDivision of Adult Neurology, Department of Neurosciences, College of Medicine-Philippine General Hospital, University of the Philippines Manila, Manila, Philippines.ORCID https://orcid.org/0000-0001-5621-1833
Almira Doreen Abigail O AporDivision of Adult Neurology, Department of Neurosciences, College of Medicine-Philippine General Hospital, University of the Philippines Manila, Manila, Philippines.ORCID https://orcid.org/0000-0002-3869-0014
Roland Dominic G JamoraDivision of Adult Neurology, Department of Neurosciences, College of Medicine-Philippine General Hospital, University of the Philippines Manila, Manila, Philippines. rgjamora@up.edu.ph.ORCID http://orcid.org/0000-0001-5317-7369
Philippine General Hospital · PH

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundDespite the expanding literature that discusses insights into the clinical picture and mechanisms by which the SARS-CoV-2 virus invades the nervous system, data on the neuropathologic findings of patients who died following SARS-CoV-2 infection is limited.

methodsA broad literature search was done for published articles that reported on histopathological findings of the brain in patients with COVID-19 in PubMed by MEDLINE, Embase, CENTRAL by the Cochrane Library, and SCOPUS from December 31, 2019 to October 31, 2020.

resultsThe systematic literature search strategy used resulted in a total of 1608 articles of which 14 were included in the analysis (PROSPERO registration number: CRD42020221022). There were ten case series, two case reports, one retrospective cohort, and one prospective cohort. The age of the patients ranged between 38 and 90 years old, most of them older than 65 years old (n=66, 45.2%) and males (n=79, 54.1%). Most tested negative in SARS-CoV-2 immunohistochemistry (n=70, 47.9%). The striking pathologic changes included diffuse edema (n=25, 17.1%), gliosis with diffuse activation of microglia and astrocytes (n=52, 35.6%), infarctions involving cortical and subcortical areas of the brain (n=4, 2.7%), intracranial bleed (subarachnoid hemorrhage and punctate hemorrhages) (n=18, 12.4%), arteriosclerosis (n=43, 29.5%), hypoxic-ischemic injury (n=41, 28.1%), and signs of inflammation (n=52, 35.6%). The cause of death was attributed to the cardiorespiratory system (n=66, 45.2%).

conclusionsThe neuropathologic changes observed likely represent direct cytopathic effects and indirect effects secondary to host-specific inflammatory response induced by the viral infection. Further studies however are required to better elucidate the pathologic mechanism.

Indexed as

AdultAgedAged, 80 and overCOVID-19FemaleHumansInflammationMaleMiddle AgedNervous SystemNervous System DiseasesCOVID-19NeuropathologySARS-CoV-2

Identifiers

PMID33483885
PMCPMC7822400
OpenAlexW3121581685

What OpenQuestion holds

Textmetadata
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 OpenQuestion graph.