Presentation
Transient weakness of left lower leg.
Patient Data
Age: 50 years
Gender: Female
{"current_user":null,"step_through_annotations":true,"access":{"can_edit":false,"can_download":true,"can_toggle_annotations":true,"can_feature":false,"can_pin":false},"extraPropsURL":"/studies/114276/annotated_viewer_json?lang=us"}
M2 segment of left middle cerebral artery divides into three branches instead of two.
{"current_user":null,"step_through_annotations":true,"access":{"can_edit":false,"can_download":true,"can_toggle_annotations":true,"can_feature":false,"can_pin":false},"extraPropsURL":"/studies/114533/annotated_viewer_json?lang=us"}
3D VRT of cerebral MR angiography shows trifurcated M2 segment left middle cerebral artery.
Case Discussion
The commonest pattern (around 80%) of branching of the MCA is by bifurcation of the M2 segment into superior and inferior divisions. About 10% make trifurcations and another 10% split into more than three branches 1. One implication of such branching patterns is that the point of division is prone to aneurysms and pseudoaneurysms.
Unable to process the form. Check for errors and try again.