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. 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.
['Andica|Christina|C|', 'Hori|Masaaki|M|', 'Kamiya|Kouhei|K|', 'Koshino|Saori|S|', 'Hagiwara|Akifumi|A|', 'Kamagata|Koji|K|', 'Fukunaga|Issei|I|', 'Hamasaki|Nozomi|N|', 'Suzuki|Michimasa|M|', 'Feiweier|Thorsten|T|', 'Murata|Katsutoshi|K|', 'Arakawa|Atsushi|A|', 'Kondo|Akihide|A|', 'Akiyama|Osamu|O|', 'Aoki|Shigeki|S|']
D000328:Adult D001927:Brain Diseases D038524:Diffusion Magnetic Resonance Imaging D004814:Epidermal Cyst D005260:Female D006801:Humans D007090:Image Interpretation, Computer-Assisted D055815:Young Adult
epidermoid cyst diffusion-weighted imaging oscillating gradient spin-echo restricted diffusion tissue microstructure