File:Aqueduct stenosis due to web (Radiopaedia 42207-45273 D 11).png

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Aqueduct_stenosis_due_to_web_(Radiopaedia_42207-45273_D_11).png ‎(512 × 512 pixels, file size: 126 KB, MIME type: image/png)

Summary:

Description
  • Radiopaedia case ID: 42207
  • Image ID: 18724130
  • Image stack position: 11/64
  • Plane projection: AX CINE Aqueduct VENC 25
  • Study findings: A third ventriculostomy has been performed by a right frontal craniotomy and approach through the right frontal lobe. Surgical tract through the right frontal lobe is surrounded by a tiny amount of blood and there is also a resultant small volume of pneumocephalus. A subtle signal loss demonstrated on high-resolution sagittal FIESTA and flow on phase-contrast flow studies (not shown). Aqueductal web and gross hydrocephalus again shown, ventricular size similar to preop. Resultant thinning of cerebral parenchyma is unchanged from the previous MRI.
  • Modality: MRI
  • System: Central Nervous System
  • Findings: Gross enlargement of the lateral and third ventricles, with superior bowing of the markedly thinned corpus callosum. The fourth ventricle is normal in caliber. Centrally, the cerebral aqueduct has a focal membrane/web without any convincing flow on CSF flow studies. No evidence of tectal plate mass. The cerebral white matter volumes are diffusely reduced, presumably related to a longstanding hydrocephalus, which is associated with the typical skull findings. No periventricular hyperintensity to suggest transependymal edema. Conclusion: Gross hydrocephalus sparing the fourth ventricle due to aqueductal stenosis.
Date Published: 28th Apr 2016
Source https://radiopaedia.org/cases/aqueduct-stenosis-due-to-web
Author Frank Gaillard
Permission
(Permission-reusing-text)		 http://creativecommons.org/licenses/by-nc-sa/3.0/

Licensing:

Attribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA 3.0)

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