MRI Pituitary gland
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The pituitary fossa is expanded, measuring 14 mm in anterior to posterior diameter, filled by a bilobed hypoenhancing tumour which has overall dimensions of 13 x 19 x 14 mm; the smaller suprasellar component measures 8 x 9 x 10 mm, and severely distorts the optic chiasm particularly slightly to the right of the midline. The infundibulum is displaced posteriorly into the right. On both sides the tumour bulges into the cavernous sinuses, contacting each carotid artery over approximately 150 degrees, without convincing invasion. The diaphragma sella is elevated, with an aperture of approximately 10 mm. The sphenoid sinus posteriorly is divided by a septum which is near the midline, slightly deviated towards the right; anteriorly the septum swings out towards the left.
The remainder of the imaged brain (please note this study has been targeted to the pituitary, and as such the whole brain has not been imaged) appears unremarkable.
Conclusion: Pituitary tumour almost certainly represents a macroadenoma.