Intracanalicular arachnoid cyst mimicking acoustic neuroma: CT and MRI.
A patient with a surgically proven intracanalicular arachnoid cyst was studied using computed tomography, magnetic resonance imaging, and air CT cisternography. The lesion had a similar radiographic appearance to acoustic neuroma and therefore, although rare, must be considered in the differential diagnosis of intracanalicular mass lesions. We report a case in which examination was performed, in evaluating the lesion, utilizing high-resolution air CT cisternography and magnetic resonance imaging (MRI).
Brooks
M L
ML
Graduate Hospital Imaging Center, Philadelphia, PA 19146.
Mayer
D P
DP
Sataloff
R T
RT
Myers
D L
DL
Spiegel
J R
JR
Ruiz
S
S
D000328:Adult; D016080:Arachnoid Cysts / Q000175:diagnosis* / Q000000981:diagnostic imaging*; D003937:Diagnosis, Differential; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D009464:Neuroma, Acoustic / Q000175:diagnosis* / Q000000981:diagnostic imaging*; D010579:Petrous Bone / Q000000981:diagnostic imaging / Q000473:pathology; D014057:Tomography, X-Ray Computed