Aneurysm of a persistent primitive olfactory artery. Case report

Area of Science:

• Neurology
• Vascular Anatomy
• Embryology

Background:

• Anterior cerebral artery (ACA) aneurysms are critical cerebrovascular pathologies.
• Vascular anomalies can alter typical cerebral circulation patterns.
• Understanding embryological origins is key to explaining congenital vascular variations.

Observation:

• A patient presented with a ruptured ACA aneurysm.
• An anomalous ACA was identified originating from the internal carotid artery bifurcation.
• This aberrant artery followed an unusual course along the olfactory tract.

Findings:

• The anomalous ACA followed an unusual hairpin turn posterior to the olfactory bulb.
• The aberrant vessel supplied the normal territory of the ACA.
• This represents a rare anatomical variation of the Circle of Willis and associated arteries.

Implications:

• This case highlights the importance of recognizing rare vascular anomalies in aneurysm management.
• The findings suggest a potential embryological link to persistent primitive olfactory arteries.
• Further research into such anomalies can improve diagnostic accuracy and treatment strategies for cerebrovascular diseases.