Acute cerebral infarction of posterior circulation in a patient with vertebral artery fenestration deformity: A case report.

Introduction: Cerebrovascular fenestration malformation is a rare congenital vascular variation. Cerebrovascular fenestration malformation rarely directly leads to cerebral infarction, and the mechanism of cerebral infarction is not clear. Cases of young patients with vertebral artery fenestration malformation who suffered from acute cerebral infarction of posterior circulation are rare and have not been reported widely. Patient concerns: A 36-year-old male patient, who had been in good health and without a family history of stroke, was admitted to our hospital with a 6-h history of dizziness and unstable walking. Diagnosis: Brain MR examination showed multiple irregular high signal lesions in the left thalamus, left occipital lobe and left cerebellum. Brain MR enhancement examination confirmed multiple cerebral infarction in left thalamus, left occipital lobe and left cerebellum. CT angiography of head and neck showed fenestration deformity of V2-V3 segment of left vertebral artery. Interventions: Considering that the patient was suffering from acute cerebral infarction of posterior circulation, he was treated with antiplatelet, lipid-lowering and plaque stabilization, etc. Outcomes: After receiving our treatment, the patient's symptoms were relieved. At 3 and 6 months after discharge, there was no dizziness, unstable walking, no acute cerebral infarction, which meant that the patient recovered well. Conclusion: In the absence of traditional risk factors and other evidence of cryptogenic stroke, the cerebral infarction in the blood supply area of fenestration malformation should be considered to be related to fenestration malformation, but its pathogenesis is not clear. Antiplatelet therapy, lipid-lowering and plaque stabilization, etc. are effective in prevention of new infarction for such patients.