Intraventricular simple cyst

Case contributed by A.Prof Frank Gaillard


Vague headaches. Finding on CT brain (not shown) for further evaluation.

Patient Data

Age: 45 years
Gender: Female

MRI Brain

A 2.3 x 2.7 x 2cm ovoid lesion in the left ventricular trigone has a thin smooth nonenhancing wall, with internal signal non diffusion restricting and following CSF.  No flow voids or suspicious vascularity. No surrounding signal abnormality. No MRI findings suspicious for calcification. Slight mass effect, with enlargement of the left lateral ventricular body, occipital and temporal horns, with displacement of choroid. However, midline is maintained, and no sulcal effacement is present. No second lesion identified.


Annotated images

Thin walled cyst (blue arrows) is in the trigone of the left lateral ventricle, with dilatation of the occipital horn (OH) and temporal horn (TH) suggesting a degree of outflow obstruction. 

Case Discussion

This case demonstrates features consistent with an incidental benign intraventricular cyst. 

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Case information

rID: 21099
Published: 3rd Jan 2013
Last edited: 14th Aug 2019
Inclusion in quiz mode: Included

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