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1 Department of Medicine, Université de Montréal, Montréal, Canada.
2 Department of Medicine - Critical Care Division, Centre hospitalier de I'Université de Montréal, Montréal, Canada.
3 Department of Medicine - Hematology Division, Centre hospitalier de I'Université de Montréal, Montréal, Canada.
4 Department of Medicine - Critical Care Division, Centre hospitalier de I'Université de Montréal, Montréal, Canada. francois.martin.carrier@umontreal.ca.
5 Department of Medicine - Hematology Division, Centre hospitalier de I'Université de Montréal, Montréal, Canada. francois.martin.carrier@umontreal.ca.
6 Department of Anesthesiology, Centre hospitalier de I'Université de Montréal, Montréal, Canada. francois.martin.carrier@umontreal.ca.
7 Carrefour de I'Innovation, Centre de recherche du Centre hospitalier de I'Université de Montréal (CRCHUM), 900, rue St-Denis, porte S03-434, Montréal, QC, H2X 0A9, Canada. francois.martin.carrier@umontreal.ca.
1 Department of Medicine, Université de Montréal, Montréal, Canada.
2 Department of Medicine - Critical Care Division, Centre hospitalier de I'Université de Montréal, Montréal, Canada.
3 Department of Medicine - Hematology Division, Centre hospitalier de I'Université de Montréal, Montréal, Canada.
4 Department of Medicine - Critical Care Division, Centre hospitalier de I'Université de Montréal, Montréal, Canada. francois.martin.carrier@umontreal.ca.
5 Department of Medicine - Hematology Division, Centre hospitalier de I'Université de Montréal, Montréal, Canada. francois.martin.carrier@umontreal.ca.
6 Department of Anesthesiology, Centre hospitalier de I'Université de Montréal, Montréal, Canada. francois.martin.carrier@umontreal.ca.
7 Carrefour de I'Innovation, Centre de recherche du Centre hospitalier de I'Université de Montréal (CRCHUM), 900, rue St-Denis, porte S03-434, Montréal, QC, H2X 0A9, Canada. francois.martin.carrier@umontreal.ca.
COVID-19 is a new disease with many undescribed clinical manifestations. We report herein a case of severe immune thrombocytopenic purpura (ITP) in a critical COVID-19 patient. A patient presented a severe episode of immune thrombocytopenia (< 10 × 109/L) 20 days after admission for a critical COVID-19. This thrombocytopenia was associated with a life-threatening bleeding. Response to first-line therapies was delayed as it took up to 13 days after initiation of intravenous immunoglobulin and high-dose dexamethasone to observe an increase in platelet count. COVID-19 may be associated with late presenting severe ITP. Such ITP may also be relatively resistant to first-line agents. Hematological manifestations of COVID-19, such as the ones associated with life-threatening bleeding, must be recognized.
All authors declare they have no competing interests.
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