Background:

Arachnoid cyst is a benign fluid collection similar in composition to cerebrospinal fluid within the arachnoid, circumscribed by normal fibrovascular tissue that compresses the leptomeninges surrounding the optic nerve.

Objective:

To describe the case of a patient with an optic nerve sheath arachnoid cyst with a typical glaucoma campimetric defect, but with an optic disc without findings of glaucoma, to highlight the need to study these cases with neuroimaging to detect this type of changes.

Conclusion:

Optic nerve sheath arachnoid cyst is an exceptional entity that generally has a benign behavior remaining stable over time; but could eventually originate compressive optic neuropathy, affecting visual acuity or visual fields due to nerve fiber layer damage. In the patient´s case this damage was manifested with a visual field defect that simulated glaucomatous neuropathy.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )