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[Isolated abducens nerve palsy caused by pontine infarction]
T Fujioka1, H Sugimoto, M Kinoshita
1Fourth Department of Internal Medicine, Toho University School of Medicine.
Rinsho Shinkeigaku = Clinical Neurology
|May 1, 1992
Summary
Recurrent isolated abducens nerve palsy in an elderly man was linked to pontine infarcts. Early diagnosis with MRI is crucial for managing this condition and its long-term prognosis.
Area of Science:
- Neurology
- Neuroimaging
Background:
- Isolated abducens nerve palsy can present with diverse etiologies.
- Recurrent cases warrant thorough investigation beyond initial assessments.
Observation:
- An 82-year-old hypertensive male experienced recurrent, transient, hemilateral abducens nerve palsy.
- Initial CT scans revealed internal capsule abnormalities and basilar artery tortuosity.
- Subsequent episodes were associated with pontine lesions identified by MRI.
Findings:
- Magnetic Resonance Imaging (MRI) identified a high-intensity spot on the left pontine base, consistent with a small pontine infarct.
- The location of the lesion correlated with the fascicle of the abducens nerve.
- Lacunar infarcts, particularly in the pons, can cause transient neurological deficits.
Implications:
- Pontine infarcts should be considered in the differential diagnosis of recurrent isolated abducens nerve palsy.
- Advanced neuroimaging, specifically MRI, is essential for accurate diagnosis and management.
- Understanding the long-term prognosis of lacunar infarction is critical for patient care.