Cerebral venous sinus thrombosis secondary to ChAdOx-1 nCov-19 vaccine.

Thrombosis and thrombocytopaenia secondary to ChAdOx-1 nCov-19 vaccine is a new phenomenon that usually occurs after the first dose of vaccine. Most of these patients are healthy without any prior history of thromboembolic events or heparin use. Hall marks of this condition include detectable antibodies to platelet factor 4 and thrombosis at atypical sites particularly cerebral veins and sinuses mimicking atypical heparin induced thrombocytopaenia. We describe a case of a patient who was diagnosed with this rare condition and treated successfully.