Note the spontaneously high signal areas in the tumour extending to the central skull base and right cavernous sinus.
Note the invasion of the right orbit, as of the whole ethmoid
Contrast enhancement after Gd is heterogeneous, with areas of necrosis
Same as 1b, after Gd
Note the high signal areas in the tumour
There is high signal material in the outer part of the right maxillary sinus corresponding to retention changes. Note also inflammatory changes in the left maxillary sinus.
Contrast enhancement helps to show the extent of the tumour infiltration in the anterior skull base.
The T2W images help to differentiate tumour limits from retention changes. Tumour has a relatively low signal.
The T2W images help to differentiate tumour limits from retention changes. Tumour has a relatively low signal (same as 3a).