title: Atypical CT and MRI aspects of an epidermoid cyst.
abstract: 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.
authors: Department of Neuroradiology, Institut National de Neurologie, Tunis, Tunisia. benhamouda.mohamed@planet.tn
authors: M
authors: M
authors: Ben Hamouda
authors: C
authors: C
authors: Drissi
authors: R
authors: R
authors: Sebai
authors: N
authors: N
authors: Hammami
authors: D
authors: D
authors: Ghorbel
authors: I
authors: I
authors: Zammel
authors: S
authors: S
authors: Nagi
authors: L
authors: L
authors: Belghith
authors: M
authors: M
authors: Khaldi
mesh_terms: 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*