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A tumour fills an expanded sella, and most of the sphenoid sinus, and extends into the clivus, of heterogeneous appearance with different regions having different signal characteristics. Seen posteriorly and superiorly, is tissue consistent with residual normal pituitary, of different signal intensity on unenhanced T1- weighted scans, with contrast enhancement, particularly on the dynamic scans typical of pituitary. The bulk of the tumour is of lower signal intensity on T1, enhances uniformly, bulges into the LEFT cavernous sinus, although does not encase the internal carotid artery. Both internal carotid arteries have normal flow voids and are not significantly stenosed on spin-echo sequences. There is suprasellar extension, but there is no compression of the optic chiasm and no significant contact/compression of the optic nerves.