File:Acoustic schwannoma - cystic (Radiopaedia 29487-29980 AXIAL RIGHT bone window 3).jpg

Summary:

• Radiopaedia case ID: 29487
• Image ID: 7238914
• Image stack position: 3/63
• Plane projection: AXIAL RIGHT
• Aux modality: bone window
• Modality: CT
• System: Central Nervous System
• Findings: There is a left extraaxial mass measuring approximately 2.7 x 2.5 cm in transverse diameter, which causes distortion upon the left middle cerebellar peduncle and fourth ventricle. There is no evidence of supratentorial hydrocephalus. The mass demonstrates foci of increased density within the central aspect of the lesion. The left internal auditory canal is enlarged measuring approximately 11 mm (on the right it measures 6 mm). The facial nerve canal is symmetric (3mm). Normal symmetric mastoid air cells and middle ear cavity. Left mastoid air cells and anterior middle ear cavity demonstrate fluid/mucus. Normal grey white matter differentiation with no evidence of acute infarct. Likely co dominant transverse sinuses. Conclusion: Left extra axial mass with distortion upon the left middle cerebellar peduncle and fourth ventricle. No evidence of supratentorial hydrocephalus. There is widening of the left internal auditory canal and in association with the incorporated MRI, the findings are likely consistent with an acoustic neuroma. Given the cystic appearance on MRI a meningioma is thought less likely.
• Published: 2nd Jun 2014
• Source: https://radiopaedia.org/cases/acoustic-schwannoma-cystic
• Author: Jack Ren
• Permission: http://creativecommons.org/licenses/by-nc-sa/3.0/

Licensing:

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