Presentation
Headache.
Patient Data
Age: 40 years
Gender: Female
From the case:
A1 segment hypoplasia
{"current_user":null,"step_through_annotations":true,"access":{"can_edit":false,"can_download":true,"can_toggle_annotations":true,"can_feature":false,"can_examine_pipeline_reports":false,"can_pin":false},"extraPropsURL":"/studies/114112/annotated_viewer_json?iframe=true\u0026lang=us"}
Hypoplastic A1 segment of right anterior cerebral artery.
Case Discussion
A1 segment hypoplasia of ACA is uncommon variant, which may increase the risk of ischemia in patients with thromboembolic disease due to reduction in collateral supply.