Psychiatric presentation of an arachnoid cyst

Area of Science:

• Neuroscience
• Neurology
• Neurosurgery

Background:

• Arachnoid cysts are congenital abnormalities that can cause neurological symptoms.
• Temporal lobe lesions are associated with cognitive and personality changes.

Observation:

• A 23-year-old male presented with progressive decline in mental functions and schizophreniform personality changes.
• A large arachnoid cyst was identified in his left temporal lobe.

Findings:

• Surgical excision of the arachnoid cyst was performed.
• Postoperatively, the patient experienced a complete reversal of his cognitive and personality deficits.

Implications:

• This case highlights the potential for large temporal lobe arachnoid cysts to mimic psychiatric disorders.
• Surgical intervention can lead to full recovery of neurological and psychological function.