Arachnoid cyst distorting the third ventricle

Case contributed by Dr Sandeep Bhuta

Patient Data

Age: Adult

The MR appearance suggests a suprasellar arachnoid cyst displacing the chiasm and infundibulum anteriorly

Case Discussion

Hydrocephalus was secondary to an obstructive third ventricle cyst.VP shunt tube in situ.

The MR appearance suggests a suprasellar arachnoid cyst displacing the chiasm and infundibulum anteriorly however on endoscopy the arachnoid cyst was (apparently) actually intraventricular in location, within the third ventricle. 

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