Distal posterior cerebral artery aneurysm. Case report.

Area of Science:

• Neurosurgery
• Vascular Neurology
• Cerebrovascular Diseases

Background:

• Posterior cerebral artery (PCA) aneurysms are uncommon, with distal segment involvement being particularly rare.
• Fetal origin of the PCA can influence aneurysm location and surgical approach.
• Understanding anatomical variations is crucial for managing complex cerebrovascular lesions.

Observation:

• A saccular aneurysm was identified arising from a fetal PCA, distal to the posterior temporal branch (P3 segment).
• The aneurysm's location was distal to the anterior temporal branch of the P2 segment.
• The patient required a ventriculoperitoneal shunt in addition to aneurysm clipping.

Findings:

• The unusual distal PCA aneurysm was successfully treated with surgical clipping.
• The patient experienced an unremarkable postoperative recovery.
• No residual neurological deficits were observed post-intervention.

Implications:

• This case expands the understanding of rare PCA aneurysm presentations and management.
• It underscores the importance of detailed neurovascular imaging and anatomical consideration in surgical planning.
• Successful treatment of this rare aneurysm offers valuable insights for neurosurgical practice and literature review.