Fig 5.

Images reveal invagination of brain tissue into the dural sinus in a 32-year-old woman with pituitary hormonal abnormalities who had otherwise normal results of an MR imaging examination.

A, Source image acquired with a 3D contrast-enhanced MPRAGE sequence shows a focal filling defect in the right transverse sinus (arrowheads) that is isointense to brain parenchyma.

B, Reconstruction image obtained in an oblique sagittal plane shows that the structure seen in A is contiguous with brain parenchyma (arrowhead), consistent with invagination of brain tissue into the dural sinus.