File:Choroid plexus papilloma (Radiopaedia 34951-36441 Axial DWI 32).png

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Choroid_plexus_papilloma_(Radiopaedia_34951-36441_Axial_DWI_32).png(512 × 512 pixels, file size: 74 KB, MIME type: image/png)

Summary:

Description
  • Radiopaedia case ID: 34951
  • Image ID: 11690849
  • Image stack position: 32/54
  • Plane projection: Axial
  • Aux modality: DWI
  • Study findings: There is a lobulated mass in the midline of the posterior fossa measuring 24 x 32 x 30 mm (trans, AP, CC). It is intimately related in the inferior vermis and extends into the left cerebellar hemisphere. It abuts the floor of the fourth ventricle and partially effaces it and it extends through the foramen magnum and displaces the medulla anteriorly. The mass has homogenous enhancement with no diffusion restriction. There are prominent flow voids within the tumor. I note that the tumor is hyperdense on a non-contrast CT. Right frontal approach ventricular drain with tip in the right lateral ventricle. Mild hydrocephalus persists. The cisternal magna is enlarged.The remainder of the brain is unremarkable with no evidence of CSF seeding. IMPRESSION: Vascular appearing posterior fossa mass centered in the inferior cerebellar with MRI appearances not pathognomonic of any one particular entity. The differential diagnosis is between choroid plexus papilloma, hemangioblastoma, ependymoma and pilocytic astrocytoma. Medulloblastoma is unlikely due to facilitated diffusion.
  • Modality: MRI
  • System: Central Nervous System
  • Findings: There is a solid hyperdense mass in the midline of the posterior fossa. It seems intimately related in the inferior vermis, abutting in the floor of the fourth ventricle and extending through the foramen magnum. The mass has homogenous enhancement with no diffusion restriction. There are prominent flow voids within the tumor. I note that the tumor is hyperdense on a non-contrast CT. Mild hydrocephalus. The remainder of the brain is unremarkable.
Date Published: 22nd Mar 2015
Source https://radiopaedia.org/cases/choroid-plexus-papilloma-5
Author RMH Neuropathology
Permission
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http://creativecommons.org/licenses/by-nc-sa/3.0/

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

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current01:44, 20 August 2021Thumbnail for version as of 01:44, 20 August 2021512 × 512 (74 KB) (talk | contribs)Radiopaedia project rID:34951 (batch #7938-156 E32)

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