File:Colloid cyst (Radiopaedia 73154-83877 Axial SWI 19).jpg

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Summary:

Description	Radiopaedia case ID: 73154 Image ID: 51878679 Image stack position: 19/56 Plane projection: Axial Aux modality: SWI Modality: MRI System: Central Nervous System Findings: Patient is follow-up, post operated case of colloid cyst. Right frontal and parietal burr hole craniotomy is seen with VP shunt in situ. Thin gliotic area is seen in right frontal lobe, reaching upto right lateral ventricle with foci of old hemorrhage – likely previous VP shunt track. Minimal gliosis and foci of hemorrhage also seen along the VP shunt. Present study reveals well defined cystic lesion, measuring approx. 17 x 16.5 x 16 mm (AP x TD x CC) in the anterosuperior aspect of third ventricle, in the region of foramen of Monro, splaying bilateral internal cerebral veins on either sides, causing elevation of bilateral fornices and mild mass effect on anterior aspect of bilateral thalami. It appears isointense on T1 and slightly hyperintense on T2W images with minimal peripheral enhancement on post contrast study. Left lateral ventricle is mildly dilated with no obvious periventricular seepage in present scan. Focal T2/FLAIR hyperintensities are seen in subcortical white of bilateral frontal lobes – likely non specific white matter hyperintensities.
Date	Published: 7th Jan 2020
Source	https://radiopaedia.org/cases/colloid-cyst-27
Author	Utkarsh Kabra
Permission (Permission-reusing-text)	http://creativecommons.org/licenses/by-nc-sa/3.0/

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