Arachnoid Cyst in Oculomotor Cistern

Abstract

Oculomotor cistern is normal anatomic structure that is like an arachnoid-lined cerebrospinal fluid-filled sleeve, containing oculomotor nerve. We report a case of arachnoid cyst in oculomotor cistern, manifesting as oculomotor nerve palsy. The oblique sagittal MRI, parallel to the oculomotor nerve, showed well-defined and enlarged subarachnoid spaces along the course of oculomotor nerve. Simple fenestration was done with immediate regression of symptom. When a disease develops in oculomotor cistern, precise evaluation with proper MRI sequence should be performed to rule out tumorous condition and prevent injury of the oculomotor nerve.

Arachnoid Cyst Causing an Oculomotor Nerve Palsy in a Pediatric Patient: A Case Report

“…9 Indications for neurosurgical management of the cyst include focal neurologic dysfunction from compression of adjacent structures, hydrocephalus, and endocrine dysfunction. Generally following fenestrations, some patients have demonstrated an immediate improvement in symptoms, 10 while others have not. 3 Outcomes of improvement specifically of oculomotor nerve function following fenestration are uncertain.…”

Pupil-sparing third cranial nerve palsy with aberrant regeneration secondary to cavernous sinus arachnoid cyst

“…Since then, there have been only a handful of other reports of intracavernous sinus arachnoid cysts with associated neuropathy, but none with a third cranial nerve palsy [ [5] , [6] , [7] ]. There has been a report of a third cranial nerve palsy, without mention of aberrant regeneration, secondary to an arachnoid cyst in an oculomotor cistern(OMC) which atypically extended into the orbital apex [ 8 ]. The OMC is a CSF filled arachnoid-lined dural cuff which is continuous with the basilar cisterns, accompanies the third cranial nerve as it enters the superolateral cavernous sinus roof, and typically terminates near the anterior clinoid process [ 9 , 10 ].…”