Symptomatic choroidal epithelial cyst in the fourth ventricle

Area of Science:

• Neurology
• Neurosurgery
• Pathology

Background:

• Choroidal epithelial cysts are rare lesions that can occur in the brain ventricles.
• Cysts in the fourth ventricle can cause significant neurological deficits due to mass effect.

Observation:

• A large choroidal epithelial cyst almost completely occupied the fourth ventricle.
• The cyst presented with intermittent hemiparesis and hemisensory disturbance.

Findings:

• Surgical excision of the cyst wall resulted in complete resolution of symptoms.
• Microscopic examination revealed a single epithelial layer with a basement membrane, consistent with a choroidal epithelial cyst.
• Electron microscopy provided further ultrastructural details of the cyst lining.

Implications:

• This case demonstrates the successful surgical management of a fourth ventricle choroidal epithelial cyst.
• Complete resection can lead to excellent patient outcomes.
• Understanding the histopathology is crucial for diagnosis and management.