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Updated: Jul 16, 2026

Role of Diffusion MRI Tractography in Endoscopic Endonasal Skull Base Surgery
Published on: July 5, 2021
Atypical CT and MRI aspects of an epidermoid cyst
M Ben Hamouda1, C Drissi, R Sebai
1Department of Neuroradiology, Institut National de Neurologie, Tunis, Tunisia. benhamouda.mohamed@planet.tn
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.
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