Fig. 3
From: Pituitary apoplexy: an update on clinical and imaging features
Large pituitary macroadenoma with MRI signs of subacute haemorrhage. In this phase, haemorrhage appears hyperintense on both T1WI (b) and T2WI (a). In the T2WI (a, e), thickening of the sphenoid mucosa (arrow) is evident as well. This sign is highly specific for pituitary apoplexy. On contrast-enhanced MRI (c, d, f) the residual pituitary gland enhances (arrow in c compared to b). Note the optic pathway compression, more evident on T2WI