CV. Omicron and Thrombosis in Children: Cause for Concern?

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Ana Mendez-Echevarria

Recopilado por Carlos Cabrera Lozada. Miembro Correspondiente Nacional, ANM puesto 16. ORCID: 0000-0002-3133-5183. 26/02/2022

To the Editors:

We have recently diagnosed 2 cases of cerebral venous sinus thrombosis in children with a positive severe acute respiratory syndrome (SARS)-CoV-2 reverse transcription-polymerase chain reaction during the emergence of the Omicron variant in our country.
Large studies have proven that coronavirus disease 2019 (COVID-19) can cause, in severe cases, thrombotic complications in adults.1 However, these hematologic disorders have been so far exceptional in children with the last predominant virus variants.2,3 Since the beginning of the pandemic, only 4 cases of venous thrombosis have been reported in Spain in children with SARS-CoV-2 infection.2 Two of these children associated several significant thrombotic risk factors, and the other 2 were female teenagers, one of whom had lupus anticoagulants. Nevertheless, since the emergence of the Omicron variant, 2 new cases of thrombosis, in 7- and 11-year-old healthy boys were recorded in our country in December 2021.

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