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[True posterior communicating artery aneurysm].

K Muneda¹, H Yoshizu, H Terada

¹Department of Neurosurgery, Tottori City Hospital, 1-1 Matoba, Tottori-city, Tottori 680-8501, Japan.

No Shinkei Geka. Neurological Surgery

|March 23, 2001

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This study details a rare true posterior communicating artery aneurysm case. Surgical clipping was successful, highlighting the importance of accurate diagnosis for this uncommon cerebrovascular condition.

Area of Science:

Neurosurgery
Vascular Neurology
Radiology

Background:

True posterior communicating artery aneurysms are rare cerebrovascular lesions.
Subarachnoid hemorrhage presents with severe headache and vomiting.

Observation:

A 51-year-old male presented with subarachnoid hemorrhage.
A true posterior communicating artery aneurysm was diagnosed via angiography on day seven.
The aneurysm was successfully treated with right frontotemporal craniotomy and clipping.

Findings:

The incidence of these aneurysms is low (0.1-2.8%), with only 21 detailed cases reported, including this one.
This case is unique as the aneurysm did not arise from a perforating artery branching site.
Posterior communicating artery aneurysms typically project away from perforating arteries, simplifying dissection.

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Implications:

Accurate preoperative diagnosis is crucial to avoid misclassification as internal carotid-posterior communicating artery aneurysms, which can lead to complications.
Surgical management, including clipping or trapping, requires careful consideration of aneurysm morphology and potential risks like postoperative ischemia.