Atypical CT and MRI aspects of an epidermoid cyst.
We report a case of an unusual epidermoid cyst (EC) of the cerebellopontine angle that appeared hyperdense on computed tomography (CT) scanning, hyperintense on T1-weighted MR images and hypointense on T2-weighted magnetic resonance (MR) images. Diffusion-weighted imaging showed a hypointense lesion. We discuss imaging characteristics of ECs, explain the atypical findings in our case and confirm that the signal seen on diffusion-weighted images in the EC is related to a T2 effect.
Ben Hamouda
M
M
Department of Neuroradiology, Institut National de Neurologie, Tunis, Tunisia. benhamouda.mohamed@planet.tn
Drissi
C
C
Sebai
R
R
Hammami
N
N
Ghorbel
D
D
Zammel
I
I
Nagi
S
S
Belghith
L
L
Khaldi
M
M
D000328:Adult; D001927:Brain Diseases / Q000000981:diagnostic imaging* / Q000473:pathology*; D002530:Cerebellopontine Angle / Q000000981:diagnostic imaging* / Q000473:pathology*; D003937:Diagnosis, Differential; D038524:Diffusion Magnetic Resonance Imaging / Q000379:methods*; D004814:Epidermal Cyst / Q000000981:diagnostic imaging* / Q000473:pathology*; D005260:Female; D006801:Humans; D014057:Tomography, X-Ray Computed / Q000379:methods*