Cerebral Venous Thrombosis Mimicking Acute Ischemic Stroke in the Emergency Assessment of Thrombolysis Eligibility: Learning from a Misdiagnosed Case.

Purpose: Cerebral venous thrombosis (CVT) occasionally presents with acute focal neurologic signs, mimicking arterial stroke syndrome. Diagnosing CVT in the setting of thrombolysis eligibility evaluation is challenging. We reported this case to discuss the promptly recognizing CVT in the setting of thrombolysis eligibility evaluation, and review the literature of thrombolytic therapy in CVT patients.

Case report: A 57-year-old man presented with acute-onset right upper extremity monoparesis, right facial palsy, and aphasia. He underwent emergent thrombolysis with recombinant tissue plasminogen activator according to American Stroke Association guidelines. Subsequently, CVT was identified on multiphase computed tomography (CT) angiography. His symptoms initially improved but subsequently deteriorated because of intracranial hemorrhage. Cryoprecipitate and tranexamic acid were immediately administered. Anticoagulation was started 24 hours after the onset of hemorrhage. His modified Rankin Scale score was 4 at 120 days after the hemorrhage.

Conclusion: Patients with CVT have a higher risk of thrombolysis-related intracranial hemorrhage than other stroke mimics. A greater focus on noncontrast brain CT and the venous phase of CT angiography help identifying this stroke mimic before thrombolysis.