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Updated: Jun 21, 2025
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Minimally Invasive Thumb-sized Pterional Craniotomy for Surgical Clip Ligation of Unruptured Anterior Circulation Aneurysms
Published on: August 11, 2015
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Intracranial aneurysms and abducent nerve palsy
Samer S Hoz1, Li Ma1, Mustafa Ismail2
1Department of Neurosurgery, University of Pittsburgh, Pittsburgh, Pennsylvania, United States.
Surgical Neurology International
|July 8, 2024
Summary
Cranial nerve (CN) palsy, particularly the 6th CN, can be an early sign of intracranial aneurysms. Recovery from abducens nerve palsy depends on aneurysm characteristics like location and rupture status.
Area of Science:
- Neurology
- Neurosurgery
- Vascular Neurology
Background:
- Cranial nerve (CN) palsy can be an initial presentation or complication of intracranial aneurysms.
- Limited research exists on the 6th cranial nerve (abducens nerve) involvement in cerebral aneurysm presentation.
Purpose of the Study:
- To investigate the association between intracranial aneurysms and 6th CN palsy.
- To analyze patterns of abducens nerve palsy related to aneurysm characteristics and outcomes.
Main Methods:
- Retrospective review of clinical data, aneurysmal characteristics, and 6th CN palsy outcomes.
- Analysis of 1311 cases to identify those with concurrent 6th CN palsy and intracranial aneurysms.
Main Results:
- Twelve cases of 6th CN palsy associated with intracranial aneurysms were identified.
- Eight cases involved unruptured internal carotid artery (ICA) aneurysms in the cavernous segment; four involved ruptured posterior inferior cerebellar artery (PICA) aneurysms.
- Full recovery rates for 6th CN palsy were 50% for unruptured ICA aneurysms and 100% for ruptured PICA aneurysms, with recovery times ranging from 1 to 5 months.
Conclusions:
- The presentation of 6th CN palsy with intracranial aneurysms may indicate specific patterns based on aneurysm location and size.
- Abducens nerve palsy is linked to both unruptured cavernous ICA and ruptured PICA aneurysms.
- Aneurysm size, rupture status, location, and treatment influence the recovery of 6th CN palsy.
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