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ナカジマ レイコ
Nakajima Reiko
中島 怜子 所属 医学部 医学科（東京女子医科大学病院） 職種 助教 |
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| 論文種別 | 原著 |
| 言語種別 | 英語 |
| 査読の有無 | 査読あり |
| 表題 | Ring-shaped lateral ventricular nodules detected with brain MR imaging. |
| 掲載誌名 | 正式名：Magnetic resonance in medical sciences : MRMS : an official journal of Japan Society of Magnetic Resonance in Medicine 略 称：Magn Reson Med Sci ISSNコード：18802206/13473182 |
| 掲載区分 | 国内 |
| 巻・号・頁 | 12(2),pp.105-10 |
| 著者・共著者 | Nakajima Reiko, Uchino Akira, Saito Naoko, Nishikawa Ryo |
| 担当区分 | 筆頭著者,責任著者 |
| 発行年月 | 2013 |
| 概要 | PURPOSE:We evaluated the prevalence and imaging characteristics of ring-shaped lateral ventricular nodules (RSLVNs) detected by postcontrast brain magnetic resonance (MR) imaging.MATERIALS AND METHODS:We retrospectively reviewed cranial MR images of 1,241 patients who underwent contrast-enhanced brain imaging between January 1, 2008 and March 31, 2011, excluded images of inadequate quality of 130 patients, and ultimately analyzed images of 1,111 patients (544 male, 567 female). We assessed location, shape, and signal intensity of RSLVNs on T₁-weighted (T₁WIs), T₂-weighted (T₂WIs), fluid-attenuated inversion recovery (FLAIR), and diffusion-weighted (DWIs) images and characteristics of contrast enhancement.RESULTS:In 5 patients, we found 6 RSLVNs (0.45%), four in the frontal horn and two in the roof of the body. Three RSLVNs were round, two were oval, and one was lobular on axial images. All 6 RSLVNs were isointense with adjacent brain parenchyma on T₁WI, T₂WI, and DWI but slightly hyperintense on FLAIR images; none showed enhancement on postcontrast MR imaging. Five nodules serially examined (range, 8 to 24 months) showed no interval changes.CONCLUSIONS:Our MR imaging findings of a 0.45% prevalence of RSLVNs shows they are not so rare as previously reported. Except for configuration, all nodules had similar intensity, and none showed contrast enhancement. Absence of changes during the follow-up period seemed to indicate that the nodules have no clinical significance. However, their clear differentiation avoids unnecessary surgery. |
| DOI | 10.2463/mrms.2012-0044 |
| PMID | 23666152 |