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Optic tract compression from dolichoectatic basilar artery.

M F Guirgis¹, B L Lam, S F Falcone

¹Bascom Palmer Eye Institute, Miami, Florida 33163, USA.

American Journal of Ophthalmology

|July 31, 2001

Summary

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A rare case shows a dolichoectatic basilar artery compressing the optic tract, leading to progressive vision loss. This highlights a potential cause of visual field defects.

Area of Science:

Neuro-ophthalmology
Vascular Neurology

Background:

Dolichoectasia of the basilar artery is a rare vascular condition characterized by abnormal dilation and elongation.
Compression of adjacent neural structures can occur, but optic tract involvement is uncommon.

Observation:

A 74-year-old male presented with a 13-year history of progressive vision loss.
Clinical examination revealed bilateral optic nerve head pallor and a left homonymous hemianopia.
No other neurological deficits were reported.

Findings:

Magnetic resonance imaging (MRI) and angiography demonstrated a severely dolichoectatic basilar artery.
The enlarged artery was identified as the cause of compression on the right optic tract.

Implications:

Related Experiment Videos

This case underscores that basilar artery dolichoectasia can present as a rare cause of optic tract compression.
It emphasizes the importance of considering vascular anomalies in the differential diagnosis of progressive visual field defects and vision loss.