Fenestration of the internal carotid artery: a rare mass of the hypotympanum associated with persistence of the stapedial artery.
A 61-year-old woman was examined because of unilateral nonpulsatile tinnitus involving the right ear. CT scanning showed a soft-tissue mass in the hypotypanum. Angiographically, the mass was identified as a fenestrated or duplicated internal carotid artery associated with persistence of the stapedial artery. Embryologic considerations are discussed.
Koenigsberg
R A
RA
Department of Radiology, Medical College of Pennsylvania, Philadelphia 19129, USA.
Zito
J L
JL
Patel
M
M
Swartz
J D
JD
Goldofsky
E
E
Zahtz
G
G
D001158:Arteries / Q000002:abnormalities; D002343:Carotid Artery, Internal / Q000002:abnormalities* / Q000000981:diagnostic imaging; D002533:Cerebral Angiography; D003937:Diagnosis, Differential; D004432:Ear, Middle / Q000098:blood supply; D005260:Female; D006801:Humans; D008875:Middle Aged; D013199:Stapes / Q000098:blood supply*; D014012:Tinnitus / Q000209:etiology*; D014057:Tomography, X-Ray Computed