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Cerebellopontine angle arachnoid cyst

Case contributed by Mohammadtaghi Niknejad
Diagnosis almost certain

Presentation

Workup for headache.

Patient Data

Age: 65 years
Gender: Male

A 30×9 mm fluid density well-defined extra-axial area is present at the left cerebellopontine angle.

Case Discussion

Features are most consistent with cerebellopontine angle arachnoid cyst.

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