What is the main abnormality and what is the differential?
A large mass is present in the suprasellar region, which is of intermediate density. The two most likely entities are a meningioma or a macroadenoma. Craniopharyngioma, metastasis, and a number of other base of skull tumours can also be considered but are statistically less likely.
There is a relatively large focal solid slightly hyperdense mass lesion in the pituitary fossa with suprasellar extension measuring approximately 27 mm in keeping with the known pituitary tumour. The sphenoid sinuses are essentially clear likewise the other paranasal sinuses and the nasal cavity.
Appearances of the cerebral and cerebellar parenchyma are relatively unremarkable on the unenhanced scan. Slightly prominent temporal horns of the lateral ventricles identified otherwise the ventricles are age-appropriate likewise the cerebral sulcal pattern. The midline is central. No intracranial haemorrhage is shown.