Anomalous intracranial venous drainage

Case contributed by Dr Eric F Greif


Vertigo and headache for years.

Patient Data

Age: 75
Gender: Female

A prominent vein is identified in the posterior right temporal bone. This represents a collateral vessel from the right sigmoid sinus and there appears to be congenital hypoplasia of the upper portion of the right internal jugular vein and distal sigmoid sinus. The right jugular foramen is rudimentary with the left foramen being dominant. There is mild mucoperiosteal thickening identified in the right middle ear with hypoplasia of the right mastoid air cells.

Case Discussion

Enlarged emissary veins that normally involute during development can be a dominant draining source  to the internal jugular vein when associated with a hypoplastic sigmoid venous sinus or jugular foramen 1

This study demonstrates a trans-mastoid emissary vein collateral

The patients complaint of tinnitus may be secondary to the prominent trans-mastoid emissary vein, or the vein may be of no consequence.  



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Case information

rID: 28161
Published: 13th Mar 2014
Last edited: 18th Dec 2015
System: Head & Neck
Inclusion in quiz mode: Included

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