iii ) Skull base / Temporal Bone
Dissection and Aneurysm will be covered in section iv)
The relevant DDx is pulsatile tinnitus with a vascular mass in the middle ear:
4) aberrant ICA
if this diagnosis is not made and surgery is done a 3) pseudoaneurysm can result
glomus tympanicum / glomus jugulotympanicum
Case in Point (2/23/2007)
http://3s.acr.org/CIP/ArchiveCaseView.aspx?CaseId=BF4Th0RkFDs%3d
6) Jugular dehiscence
Others to consider are:
8) High riding juglar bulb
7) Jugular diverticulum
5) Persistent stapedial artery
Case in Point (8/2/2006)
http://3s.acr.org/CIP/ArchiveCaseView.aspx?CaseId=gxioKFgDF5Y%3d
Reference:
- a classic reference by Lo et. al
https://pubs.rsna.org/doi/abs/10.1148/radiographics.5.6.3880011