Spatial Restriction within Intracranial Epidermoid Cysts Observed Using Short Diffusion-time Diffusion-weighted Imaging

We report two cases of pathologically proven intracranial epidermoid cysts. Both cases were scanned with diffusion-weighted imaging using pulsed gradient spin-echo (PGSE) and oscillating gradient spin-echo (OGSE; 50 Hz) prototype sequences with diffusion times of 47.3 ms and 8.5 ms, respectively. Th...

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Bibliographic Details
Published in:Magnetic Resonance in Medical Sciences 2018, Vol.17(3), pp.269-272
Main Authors: Andica, Christina, Hori, Masaaki, Kamiya, Kouhei, Koshino, Saori, Hagiwara, Akifumi, Kamagata, Koji, Fukunaga, Issei, Hamasaki, Nozomi, Suzuki, Michimasa, Feiweier, Thorsten, Murata, Katsutoshi, Arakawa, Atsushi, Kondo, Akihide, Akiyama, Osamu, Aoki, Shigeki
Format: Article
Language:English
Subjects:
Case Report
Cysts
Diffusion coefficient
Diffusion layers
diffusion-weighted imaging
epidermoid cyst
Histopathology
Keratin
Laminates
oscillating gradient spin-echo
restricted diffusion
tissue microstructure
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Summary:We report two cases of pathologically proven intracranial epidermoid cysts. Both cases were scanned with diffusion-weighted imaging using pulsed gradient spin-echo (PGSE) and oscillating gradient spin-echo (OGSE; 50 Hz) prototype sequences with diffusion times of 47.3 ms and 8.5 ms, respectively. The apparent diffusion coefficient measured by OGSE was higher than that measured by PGSE, indicating the spatial restriction of water diffusion in the laminated keratin layers within the cyst as demonstrated by histopathology.
ISSN:1347-3182
1880-2206
DOI:10.2463/mrms.cr.2017-0111