MR imaging of pituitary apoplexy. a A sagittal T1 image of the pituitary gland. The enlarged sella containing an abnormal soft tissue with increased signal intensity is suggestive of haemorrhage. b A transverse T1 image of the pituitary gland 2 months following presentation. The sella is expanded and contains abnormal soft tissue that is of low T1 signal. A small area of high T1 signal in the superior aspect of this is taken to represent normal posterior pituitary signal. There are no features of haemorrhage on this later scan.