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 haemorrhage 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.