Angiographic findings
| Patient/Age (years)/Sex | Fistula Site | Feeding Artery | Obstructed Petrosal Sinus | Retrograde Drainage Veins |
|---|---|---|---|---|
| 1/69/F | R/L CS | R/L ECA, ICA | R/L superior, inferior | Cortical, deep |
| 2/66/F | R/L CS | R/L ECA, ICA | R/L superior, inferior | Cortical, deep |
| 3/58/F | R/L CS | R/L ECA, ICA | R/L superior, inferior | Cortical, deep, superior ophthalmic, PF |
| 4/62/F | L CS | R/L ECA, ICA | L superior, R/L inferior | Deep, superior ophthalmic, PF, SV |
| 5/77/M | L CS | R/L ICA | R/L superior, inferior | Cortical, deep |
| 6/51/F | R CS | R/L ECA, ICA | R/L superior, inferior | Superior ophthalmic |
| 7/62/F | R CS | R/L ECA, ICA | R/L superior, inferior | Deep, superior ophthalmic |
| 8/62/F | L CS | R/L ECA, ICA | R/L superior, inferior | Superior ophthalmic |
| 9/76/F | R/L CS | R ICA, R/L ECA | R/L superior, inferior | Cortical, deep, superior ophthalmic, PF |
| 10.52/M | R CS | R/L ECA | Not applicable | Cortical |
| 11/50/F | L CS | L ECA | Not applicable | Superior ophthalmic |
| 12/52/F | L CS | L ECA | R/L superior, inferior | Deep |
| 13/70/F | L CS | L ECA, ICA | R/L superior, inferior | Superior ophthalmic |
| 14/77/F | L CS | L ECA, ICA | L superior, R/L inferior | Cortical, deep |
| 15/70/M | Tent | L ECA, ICA; R/L VA | a | Cortical, deep |
| 16/64/M | L CS | L ECA, ICA | R/L superior, inferior | PF |
| 17/50/F | L transverse sinus | L ECA, ICA; L | a | Cortical, deep, PF, SV, superior ophthalmic |
| 18/70/F | L CS | R ECA, ICA | Not applicable | Superior ophthalmic, PF |
| 19/78/F | L CS | R/L ECA, R, ICA | L inferior | Cortical, superior ophthalmic, SV |
| 20/70/M | L sigmoid sinus | L ECA | a | Cortical, PF |
| 21/71/F | R CS | R ECA, ICA | L inferior | Superior ophthalmic |
Note.—PF, leptomeningeal vein of the posterior fossa; SV, spinal vein; VA, verbetral arteries.
a Obstruction was in the L sigmoid sinus and superior sagittal sinus (patient 15), R transverse sinus (patient 17), or R transverse sinus (patient 20).