Epidermoid cyst of the fourth ventricle: diffusion-weighted and flair MR imaging findings.
Fourth ventricle epidermoid cysts are rare lesions, arising from epithelial remnants at the time of neural tube closure. They are well-defined CT hypoattenuated masses that resemble CSF on all conventional MR imaging sequences. We present a case of a pathological proven less common fourth ventricle epidermoid cyst with special emphasis on the use of FLAIR and EPI-DW imaging sequences in the diagnosis.
Department of Radiology, University Hospital Gasthuisberg, Herestraat 49, 3000 Leuven, Belgium. mermuyskoen@hotmail.com
K
K
Mermuys
G
G
Wilms
Ph
P
Demaerel
D001927:Brain Diseases / Q000175:diagnosis* / Q000601:surgery; D003937:Diagnosis, Differential; D038524:Diffusion Magnetic Resonance Imaging; D004814:Epidermal Cyst / Q000175:diagnosis* / Q000601:surgery; D005260:Female; D020546:Fourth Ventricle; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008875:Middle Aged