Fig 1. A 52-year-old woman presented with a 1-year history of blurred vision in both eyes. A, T1-weighted axial image exhibits a hypointense dumbbell-shaped mass involving both sellar and parasellar regions. B, The mass demonstrates marked hyperintensity on T2-weighted axial imaging, and encasement of the right internal carotid artery can be seen. C, Strong homogeneous enhancement can be found in the mass on postcontrast T1-weighted axial imaging. D, Microphotograph of surgical specimen reveals large numbers of thin-walled vascular sinusoids, with a single layer of endothelium-lined capillaries, and scanty connective tissue (type A pathologic features; hematoxylin and eosin [H&E], original magnification, x 40).