MRI
Axial T1
Axial T2
Sagittal T1 C+
Axial T1 C+
Axial DWI
Sagittal T2
Coronal T2
A large well-marginated mass in the sellar region extends into the suprasellar region. Slightly heterogeneous but intense enhancement following IV contrast administration confirms the presence of a mass. Imaging appearances are highly suggestive of a pituitary macroadenoma.
The heterogenous T2 signal is likely to be due to internal haemorrhage.
Restricted diffusion is seen on the diffusion-weighted imaging. This is important as it has been reported as an early sign of pituitary apoplexy 1.