Figure 1.

Pituitary apoplexy following head trauma in a 61-year-old cyclist on aspirin who developed acute loss of vision in the left eye. A, Noncontrast axial computed tomography (CT) image demonstrating left temporal bone fracture with associated subdural hematoma (white arrow). The sella is expanded because of the presence of a pituitary adenoma. Within the center of pituitary adenoma there is hyperintense material as a result of hemorrhage (black arrow). B, T2 axial magnetic resonance imaging (MRI); C, T1 axial MRI; and D, T1 sagittal MRI performed shortly afterward also demonstrate the pituitary tumor and hemorrhage, extending suprasellar and leading to visual symptoms. In the acute phase hemorrhage is hypointense on T1 and can therefore be difficult to visualize compared to CT.