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sigmoid sinus

   Also found in: Medical, Encyclopedia, Wikipedia 0.01 sec.
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Noun1.sigmoid sinus - an S-shaped dural sinus on the temporal and occipital bones
venous sinus, sinus - a wide channel containing blood; does not have the coating of an ordinary blood vessel


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It houses the jugular bulb, which continues as the jugular vein inferiorly and the sigmoid sinus superiorly.
Mastoiditis complications arise when the inflammation spreads throughout the antrum and in the posterior fossa of the skull, the middle cranial fossa, the facial nerve canal, and the sigmoid sinus side, and the end of the petrous bone temporal.
No intracranial extension was seen, but the MRI did identify a thrombosis in the adjacent transverse dural sinus that extended to the sigmoid sinus and internal jugular vein (figure 2 A).
 
 
 
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