Where is the mass located?
The mass is located in the third ventricle and causes the supraoptic recess and floor of the third ventricle to bow outwards.
Is the pituitary gland involved?
No, the pituitary appears separate and normal. No suprasellar mass evident.
What are some diagnostic possibilities?
The thrid ventricle is an uncommon site for tumours. Common intraventricular tumours in an unusual location to be considered include ependymoma, intraventricular meningioma, choroid plexus papilloma, metastasis. Uncommon lesions typically found in this location include intraventricular craniopharyngioma and germinoma.
Large heterogeneously enhancing third ventricular mass with innumerable T2 hyperintense/T1 hypointense small cysts. Subtle foci of T2 / GRE hypointensity suggest small foci of calcification. The mass is adjacent to but not in communication with the posterior clinoid process.
There is no sellar or suprasellar extension and no transependymal oedema.