Relatively well-defined lobulated altered signal intensity mass lesion, measuring 6.5 cm x 3.8 cm x 4.4 cm (AP x CC x TR), in the left suprasellar, left lateral sulcus cistern and left frontal region protruding into the left lateral ventricle. It shows heterogeneous T1W hyperintensity and heterogeneous T2W hyperintensity with partial signal suppression on T1-FS suggesting fatty and haemorrhagic components. Peripheral foci of calcification are seen. Post-contrast T1FS shows mild peripheral rim enhancement.
Restricted diffusion is seen within the mass on DWI and ADC mapping.
T1 hyperintensity with chemical-shift artefact at the tip of the left frontal horn suggests fat-CSF level. Fat signal intensity in the left paramedian frontal sulcal space.
Findings are consistent with ruptured intracranial dermoid cyst. It is causing marked mass effect with hydrocephalus and leftward midline shift. Mass effect is seen over left optic chiasma which show T2 hyperintense signal intensity.