MRI
Axial T1
Axial FLAIR
Coronal T2
Axial Gradient Echo
Axial DWI
Axial ADC
Coronal T1 C+
Sagittal T1 C+
Axial T1 C+
The MRI sequences demonstrate a large well-defined extra-axial left frontal mass of parasagittal location centred on the olfactory groove/planum sphenoidale with CSF cleft sign. It displays a low signal on T1WI, inhomogeneous high signal on T2WI with central areas of bleeding causing high signal on T1WI, and low signal on T2WI/GE as well as focal cystic changes. The postcontrast sequences show an intense and heterogeneous enhancement with central necrosis. A mass effect is noted on the falx cerebri and frontal horns.