Fig 1.
Typical MRI manifestation of brain sagging.
Midsagittal T1-weighted MRI shows downward displacement of the cerebellar tonsil by 5 mm (arrow).
Fig 2.
Typical MRI manifestation of the venous distension sign.
T1-weighted MRI through the midportion of the dominant transverse sinus shows the venous distension sign (box).
Fig 3.
Typical MRI manifestation of dural enhancement.
T1-weighted MRIs with gadolinium enhancement shows dural enhancement in coronal (A) and horizontal (B) images (arrows).
Fig 4.
CT myelography for evaluating dural leakage.
CT myelography shows contrast tracking along bilateral nerve roots (A, arrows) and collections of contrast within the paraspinal soft tissue (B, arrows). Images taken at segments C4-5 (A) and T5-6 (B).
Table 1.
Results of univariate analysis.
Table 2.
Results of multivariate analysis.