Multiple thrombi in a child diagnosed with coronavirus disease 2019 treated with cardiac surgery

Coronavirus disease 2019 (COVID-19) is characterized predominantly by respiratory symptoms but may affect all systems, and it has been associated with thrombosis in adults. Case series investigating the COVID-19-associated multisystem inflammatory syndrome in children have reported high fibrinogen and D-dimer levels; however, it is not known whether this causes thrombophilia. Herein, we report a previously healthy 13-year-old male patient who had multiple thromboses associated with COVID-19, which occurred during long-term follow-up and was successfully treated with cardiac surgery. We want to emphasize that the long-term effects of COVID-19 are not yet known and that the follow-up of these cases should be continued.