Table 1.

Occurrence of DAVs in our institution during 1999-2005.

Location	N° of cases
Cavernous sinus	25	(43.1%)
Trans-sigmoid sinus	16	(27.6%)
Tentorial sinus	5	(8.6%)
Hypoglossal canal	3	(5.1%)
Marginal sinus	2	(3.4%)
Superior sagittal sinus	1	(3.4%)
Convexity	2	(3.4%)
Anterior fossa	1	(1.7%)
Superior petrosal sinus	1	1.7%)
Posterior condylar canal	1	(1.7%)