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TABLE 1: Dural arteriovenous fistula location according to angiographic type
Dural Venous Sinus Type I Type II Type III
Cavernous 6 5 —
Transverse/sigmoid 2 4 3
Superior sagittal — 2 —
Superior petrosal — 1 —
Tentorial — — 2
Anterior skull base — — 1
Foramen magnum — — 1
Note.—numerals indicate patient numbers.
Dural Venous Sinus	Type I	Type II	Type III
Cavernous	6	5	—
Transverse/sigmoid	2	4	3
Superior sagittal	—	2	—
Superior petrosal	—	1	—
Tentorial	—	—	2
Anterior skull base	—	—	1
Foramen magnum	—	—	1