Evidence map›Paper›PMID 34774202›Full record

ReviewThe Lancet. Haematology2022

Vaccine-induced immune thrombotic thrombocytopenia.

Frederikus A Klok, Menaka Pai, Menno V Huisman, Michael Makris

Open access · bronzeAbstract readReview
In one paragraph

Review in The Lancet. Haematology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 107 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
107citing papers in PubMed, 2 pooled it
32.6field-weighted citation impact, top 1% 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

107 citing papers in PubMed, 2 syntheses or guidelines pooled it, 179 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
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  6. Review
  7. Article
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  11. Cerebral venous thrombosis: Current management, recent advances and future directions.International journal of stroke : official journal of the International Stroke Society · 2025
    Review
  12. Review
  13. Emerging and Pandemic Pathogens: Lessons Learned From a Clinical Research Network.Clinical infectious diseases : an official publication of the Infectious Diseases Society of America · 2025
    Review
  14. Review
  15. Review
  16. Design and Pharmacological Characterization of a Novel Antithrombotic P2YInternational journal of molecular sciences · 2025
    Article
  17. Review
  18. Review
  19. Article
  20. Article

47 more citing papers are in PubMed but not listed here.

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 2 institutions in 2 countries.

Frederikus A KlokDepartment of Medicine-Thrombosis and Hemostasis, Leiden University Medical Center, Leiden, Netherlands; Center for Thrombosis and Hemostasis, University Medical Center Mainz, Mainz, Germany. Electronic address: f.a.klok@lumc.nl.
Menaka PaiDepartment of Medicine, McMaster University, Hamilton ON, Canada.
Menno V HuismanDepartment of Medicine-Thrombosis and Hemostasis, Leiden University Medical Center, Leiden, Netherlands.
Michael MakrisDepartment of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, UK; Sheffield Haemophilia and Thrombosis Centre, Royal Hallamshire Hospital, Sheffield, UK.
Leiden University Medical Center · NLMcMaster University · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

In response to the COVID-19 pandemic, vaccines for SARS-CoV-2 were developed, tested, and introduced at a remarkable speed. Although the vaccine introduction had a major impact on the evolution of COVID-19, some potential rare side-effects of the vaccines were observed. Within a short period, three scientific groups from Norway, Germany, and the UK reported cerebral venous sinus thrombosis with thrombocytopenia and anti-platelet factor 4 (anti-PF4) antibodies in individuals following AstraZeneca-Oxford vaccination and named this new syndrome vaccine-induced immune thrombotic thrombocytopenia (VITT). This syndrome was subsequently reported in individuals who received Johnson & Johnson vaccination. In this Viewpoint, we discuss the epidemiology, pathophysiology, and optimal diagnostic and therapeutic management of VITT. Presentation of an individual with possible VITT should raise prompt testing for anti-PF4 antibodies and initiation of treatment targeting autoimmune processes with intravenous immunoglobulin and prothrombotic processes with non-heparin anticoagulation.

Indexed as

COVID-19ThrombocytopeniaVaccinesCOVID-19 VaccinesHumansPandemicsSARS-CoV-2COVID-19 VaccinesVaccines

Identifiers

PMID34774202
PMCPMC8585488
OpenAlexW3211623336

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.