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MRI centred on the pituitary demonstrates a large mass which involves the clivus, pituitary fossa and extends both anteriorly into the sphenoid sinus and superiorly into the suprasellar cistern, elevating and distorting the chiasm and floor of the third ventricle. No normal pituitary can be identified.
It is isodense on T1 with moderate heterogeneous enhancement. Many small areas of high T2 signal as scattered throughout the mass.