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Persistent Primitive Olfactory Artery Type 4 with Fusiform Aneurysm: A Case Report.

Heecheol Park, Jin Wook Baek, Hae Woong Jeong

Journal of the Korean Society of Radiology

|December 18, 2023

Summary

A rare persistent primitive olfactory artery (PPOA) variant was identified with a fusiform aneurysm. This finding highlights the importance of recognizing unusual cerebral artery variations and associated risks like aneurysms.

Keywords:

Arteries Cerebral Angiography Cerebral Arteries Intracranial Aneurysm Magnetic Resonance Angiography

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Area of Science:

Neuroanatomy
Vascular Neurology
Radiology

Background:

The persistent primitive olfactory artery (PPOA) is a rare anatomical variant of the anterior cerebral artery.
PPOA is associated with increased risk of aneurysm formation due to specific hemodynamic stress at its hairpin turn.

Observation:

A case of PPOA type 4 is presented in a 46-year-old female experiencing occasional headaches.
Imaging revealed an anomalous branch from the left A1 segment, coursing along the olfactory tract with a hairpin turn posterior to the olfactory bulb.

Findings:

The PPOA variant was observed to connect to the left accessory middle cerebral artery.
A fusiform aneurysm was identified at the hairpin turn segment of the PPOA.

Implications:

This case underscores the necessity of recognizing and diagnosing rare PPOA variations.
Understanding these variations is crucial for accurate diagnosis and management of associated cerebrovascular pathologies like aneurysms.