Legend Left: Axial T2 image shows an approximately 5mm round flow void near the junction of the A1 segment of the left Anterior Cerebral Artery (ACA) and the Anterior Communicating Artery (ACom). A smaller round flow void in the left suprasellar cistern is the supraclinoid portion of the internal carotid artery. Right: Axial FLAIR image shows some signal in the center of the anterior flow void.

Legend Left: Maximum Intensity Projections (MIPs) of the cerebral vasculature show an aneurysm near the junction of the left ACA and the anterior communicating artery (ACom). Right: Volume rendered CT angiogram confirms the Acom aneurysm.

Legend Cerebral angiogram demonstrates the saccular aneurysm arising from the junction of the left ACA and ACom. Key words: mri mra cta angiogram vascular aneurysm

Brain Diagnosis: Anterior communicating artery aneurysm