Intraventricular arachnoid cyst

Case contributed by Ammar Haouimi
Diagnosis almost certain

Presentation

Chronic headaches.

Patient Data

Age: 40 years
Gender: Female

There is an intraventricular cystic lesion within the right occipital horn of CSF signal intensity on all sequences with a thin wall. No enhancement or restricted diffusion is seen.

Note hyperostosis frontalis interna.

Case Discussion

MRI features characteristic of an intraventricular arachnoid cyst.

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