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Peripheral PICA aneurysm. Case report.

R Rodriguez y Baena, P Gaetani, V Silvani

Journal of Neurosurgical Sciences

|October 1, 1985

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A rare distal posterior inferior cerebellar artery (PICA) aneurysm in a 73-year-old woman was successfully treated with clipping. This case highlights the importance of four-vessel angiography for detecting these uncommon intracranial aneurysms.

Area of Science:

Neurosurgery
Vascular Neurology
Radiology

Background:

Posterior inferior cerebellar artery (PICA) aneurysms are rare intracranial aneurysms, accounting for 0.5-0.7% of all intracranial aneurysms.
Distal PICA aneurysms, particularly those arising from the telo-velo tonsillary segment, are exceptionally uncommon, with only 72 cases previously reported with detailed studies.

Observation:

A case report details a 73-year-old female patient with an aneurysm of the right distal posterior inferior cerebellar artery (PICA).
The aneurysm originated from the telo-velo tonsillary segment of the PICA.
The patient underwent a successful surgical clipping procedure for the aneurysm.

Findings:

This report adds to the limited literature on distal PICA aneurysms.
The successful clipping demonstrates the viability of surgical intervention for this rare condition.

Related Experiment Videos

The rarity of distal PICA aneurysms underscores the need for thorough diagnostic evaluation.

Implications:

Accurate diagnosis and surgical planning require precise identification of the aneurysm's origin segment.
Four-vessel angiography is recommended for detecting PICA aneurysms, as they can be easily missed with other imaging modalities.
This case contributes to the understanding and management strategies for rare cerebrovascular pathologies.