2021
DOI: 10.1016/j.bbi.2021.04.006
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Cerebral venous sinus thrombosis and thrombocytopenia after COVID-19 vaccination – A report of two UK cases

Abstract: Recent reports have highlighted rare, and sometimes fatal, cases of cerebral venous sinus thrombosis (CVST) and thrombocytopenia following the Vaxzevria vaccine. An underlying immunological mechanism similar to that of spontaneous heparin-induced thrombocytopenia (HIT) is suspected, with the identification of antibodies to platelet factor-4 (PF4), but without previous heparin exposure. This unusual mechanism has significant implications for the management approach used, which differs from usual treatment of CV… Show more

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Cited by 112 publications
(132 citation statements)
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“…Since the publication of the studies described above, several individual cases of cerebral venous thrombosis or ischemic stroke in close temporal proximity with the administration of the vaccine ChAdOx1 nCov-19 have been published. Most of the cases were accompanied with thrombocytopenia and were described in patients under 60 years of age [17][18][19][20][21][22][23].…”
Section: Vaccine-induced Immune Thrombotic Thrombocytopenia: a Rare New Syndromementioning
confidence: 99%
“…Since the publication of the studies described above, several individual cases of cerebral venous thrombosis or ischemic stroke in close temporal proximity with the administration of the vaccine ChAdOx1 nCov-19 have been published. Most of the cases were accompanied with thrombocytopenia and were described in patients under 60 years of age [17][18][19][20][21][22][23].…”
Section: Vaccine-induced Immune Thrombotic Thrombocytopenia: a Rare New Syndromementioning
confidence: 99%
“…Vaccine-induced immune thrombotic thrombocytopenia is a syndrome that was first reported in April 2021 among patients who had recently received the ChAdOx1 nCoV-19 vaccine. [2][3][4][5][6][7] It closely resembles HIT, in which antibodies, typically immunoglobulin G (IgG), are produced against circulating complexes of PF4 and endogenous heparin. [8][9][10] and regulate hemostasis by releasing PF4, a 70-amino acid protein that binds heparin.…”
Section: Discussionmentioning
confidence: 99%
“…18 There are reported cases of cavernous sinus thrombosis and thrombocytopenia after receiving the ChAdOx1 COVID-19 vaccine. 19 In addition, a recent report details 23 patients who developed a pathogenic PF4-dependent syndrome, unrelated to heparin therapy, after receiving the same vaccine. 20 Prompt recognition of thrombosis and thrombocytopenia in the setting of COVID-19 or recent COVID-19 vaccination, consideration of appropriate workup and initiation of proper management is vital to provide high-quality medical care to these patients.…”
Section: Discussionmentioning
confidence: 99%