Type of transverse sinus stenosis found at direct venography in 52 patients with IIH
| Type of Stenosis | No. |
|---|---|
| Intrinsic/extrinsic of both sinuses | 16 |
| Intrinsic/extrinsic of dominant sinus, hypoplastic sinus | 8 |
| Intrinsic of both sinuses | 8 |
| Intrinsic of dominant, hypoplastic sinus | 9 |
| Extrinsic of both sinuses | 7 |
| Extrinsic of dominant, hypoplastic sinus | 4 |