File:Acoustic schwannoma (translabyrinthine resection) (Radiopaedia 43570-46971 Axial non-contrast 1).png

Summary:

• Radiopaedia case ID: 43570
• Image ID: 20243404
• Image stack position: 1/27
• Plane projection: Axial
• Aux modality: non-contrast
• Study description: CT Brain (postoperative)
• Study findings: Previous translabyrinthine approach craniotomy and resection of left acoustic neuroma noted. Overlying mild subcutaneous swelling containing a small volume of gas and surgical clips also noted. No intra- or extra-axial collection or hemorrhage demonstrated. Grey-white differentiation is preserved. Ventricular size, sulcal pattern and basal cisterns all appear unchanged. Pneumocephalus has almost resolved. Most of the mastoid has been resected on the left but fluid fills remaining mastoid air cells. Opacification of the left middle ear cavity has been present since the post-operative CT brain. Partial opacification of the left sphenoid sinus was present preoperatively. No fluid in ethmoid air cells.​
• Modality: CT
• System: Central Nervous System
• Findings: MRI demonstrates a solid heterogeneous tumor at the left cerebellopontine angle, enlarging and partially occupying the left internal acoustic canal, exhibiting vivid contrast enhancement and mass effect over the adjacent cerebellar peduncle and pons. The fourth ventricle is partially effaced, however there is no obstructive hydrocephalus.
• Published: 27th Mar 2016
• Source: https://radiopaedia.org/cases/acoustic-schwannoma-translabyrinthine-resection-1
• Author: Bruno Di Muzio
• Permission: http://creativecommons.org/licenses/by-nc-sa/3.0/

Licensing:

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