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23-year-old man with a left-sided temporal arachnoid cyst, suffering from occasional headaches. 23-year-old man with a left-sided temporal arachnoid cyst,

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Presentation on theme: "23-year-old man with a left-sided temporal arachnoid cyst, suffering from occasional headaches. 23-year-old man with a left-sided temporal arachnoid cyst,"— Presentation transcript:

1 23-year-old man with a left-sided temporal arachnoid cyst, suffering from occasional headaches.
23-year-old man with a left-sided temporal arachnoid cyst, suffering from occasional headaches. A, Transverse T2-weighted SE image (2000/80/1) shows a hyperintense left temporal arachnoid cyst.B, Coronal PSIF image (20/25/1) depicts distinct signal reduction (arrow) arising from the basal cisterns, indicating probable communication.C, CT cisternogram (3-hour delay) shows slight contrast enhancement within the cyst, confirming slow communication. The contrast enhancement was confirmed by measuring a clear increase of intracystic HU. The site of communication was not detectable on the CT cisternogram owing to proposed valve mechanism with slow communication. Karl T. Hoffmann et al. AJNR Am J Neuroradiol 2000;21: ©2000 by American Society of Neuroradiology

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