Clinically silent choroid plexus cyst: evaluation by diffusion-weighted MRI.
We retrospectively reviewed diffusion-weighted magnetic resonance images of 57 patients with a choroid plexus cyst diagnosed by contrast-enhanced T1-weighted imaging. All the cysts appeared to represent incidental findings. Thirty-eight of 57 patients had bilateral cysts and 19 had unilateral ones. On diffusion-weighted images, 78 of 95 cysts showed homogeneously high signal intensity, 12 showed focal high signal areas, and 5 had no portion with a high signal. The apparent diffusion coefficient of the high signal areas in the cysts was (1.46+/-0.14) x10(-3) mm(2)/s, intermediate between the apparent diffusion coefficients of cerebrospinal fluid and cerebral white matter, (3.15+/-0.67) x10(-3) and (0.79+/-0.22) x10(-3) mm(2)/s, respectively. Pathological correlation was available in one case, showing high signal intensity areas in the glomera of the choroid plexuses in the lateral ventricles on diffusion-weighted images corresponding to gelatinous cysts with highly proteinaceous content.
Kinoshita
Toshibumi
T
Division of Radiology, Department of Pathophysiological and Therapeutic Science, Faculty of Medicine, Tottori University, Yonago, Tottori 683-8504, Japan. kino@grape.med.tottori-u.ac.jp
Moritani
Toshio
T
Hiwatashi
Akio
A
Numaguchi
Yuji
Y
Wang
Henry Z
HZ
Westesson
Per-Lennart A
PL
Sugihara
Shuji
S
Matsusue
Eiji
E
Fujii
Shinya
S
Ohama
Eisaku
E
Ogawa
Toshihide
T
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001927:Brain Diseases / Q000473:pathology*; D002831:Choroid Plexus / Q000473:pathology*; D003560:Cysts / Q000473:pathology*; D038524:Diffusion Magnetic Resonance Imaging; D005260:Female; D006801:Humans; D033162:Incidental Findings; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies