Clinically silent choroid plexus cyst: Evaluation by diffusion-weighted MRI

Toshibumi Kinoshita, Toshio Moritani, Akio Hiwatashi, Yuji Numaguchi, Henry Z. Wang, Per Lennart A. Westesson, Shuji Sugihara, Eiji Matsusue, Shinya Fujii, Eisaku Ohama, Toshihide Ogawa

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


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)×10-3 mm2/s, intermediate between the apparent diffusion coefficients of cerebrospinal fluid and cerebral white matter, (3.15 ± 0.67) × 10-3 and (0.79 ± 0.22) × 10-3mm2/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.

Original languageEnglish
Pages (from-to)251-255
Number of pages5
Issue number4
Publication statusPublished - Apr 2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Radiology Nuclear Medicine and imaging
  • Clinical Neurology
  • Cardiology and Cardiovascular Medicine


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