Abstract
Oculomotor synkinesis or aberrant regeneration of cranial nerve III (CN III) typically
results from trauma, aneurysm, or mass lesions. We present a rare case report with
CN III palsy and synkinesis secondary to a meningocele in the left oculomotor cistern,
causing mass effect on the oculomotor nerve. Imaging suggested underlying idiopathic
intracranial hypertension (IIH) as a potential etiology. While mass lesions or trauma
are common causes of oculomotor synkinesis, an association with meningocele has not
been previously reported. This case highlights the importance of considering IIH-related
meningoceles in unexplained CN III palsies.
Keywords
oculomotor nerve - synkinesis - aberrant regeneration - meningocele - idiopathic intracranial
hypertension
