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FIG 4. Schematic drawing of the dural arteriovenous fistula and surrounding venous structures in case 1. APA indicates the ascending pharyngeal artery; DV, drainage vein; CS, cavernous sinus; SPS, superior petrosal sinus; IPS, inferior petrosal sinus; BP, basilar plexus; MS, marginal sinus; JV, jugular vein.
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