スダ　サトシ   SUDA Satoshi   須田　智    所属   埼玉医科大学  医学部 国際医療センター　神経内科・脳卒中内科    職種   教授
論文種別	学術雑誌(原著)
言語種別	英語
査読の有無	査読なし
表題	"Computed Tomography Perihematomal Rims": A Perihematomal Low-Density Area Is a Part of an Acute Brain Hemorrhage.
掲載誌名	正式名：Internal medicine (Tokyo, Japan)
掲載区分	国内
巻・号・頁	60(15),2395-2403頁
著者・共著者	Takahiro Sato,Yasuhiro Nishiyama,Satoshi Suda,Takashi Shimoyama,Shiro Takahashi,Yuki Sakamoto,Junya Aoki,Kentaro Suzuki,Tetsuro Sekine,Shin-Ichiro Kumita,Kazumi Kimura
発行年月	2021
概要	Objective Computed tomography (CT) can be used for visualizing acute intracerebral hemorrhages (ICHs) as distinct hyperdense areas and cerebral edema as perihematomal low-density areas (LDAs). We observed a perihematomal LDA on CT, which appeared to be part of a hemorrhage on magnetic resonance imaging (MRI) in acute ICH. We named this "CT perihematomal rim" and evaluated its characteristics and clinical significance. Methods We stratified patients with acute ICH according to the presence or absence of a CT perihematomal rim and then compared their radiologic findings. Logistic regression analyses were performed to assess whether the CT findings can predict the presence of a CT perihematomal rim. Patients Patients within 24 hours of ICH onset who were admitted between September 1, 2014, and October 31, 2018, were registered. Results Overall, 139 patients (91 men; mean age, 66 years) were investigated. CT perihematomal rims were observed in 40 patients (29%). ICH volumes on CT were 30% smaller than those on MRI in patients with CT perihematomal rims. On a multivariate analysis, the presence of a CT perihematomal rim was independently associated with the maximum diameter of the perihematomal LDA. According to a receiver operating characteristic analysis, the maximum LDA diameter threshold was 7.5 mm (sensitivity, 85%; specificity, 83%). Conclusion CT perihematomal rims were observed in 29% of the patients with acute ICH. A perihematomal LDA (>7.5 mm) in acute ICH cases should be considered a CT perihematomal rim. Clinicians should be aware that the ICH volume on CT may be underestimated by 30%.
DOI	10.2169/internalmedicine.6653-20
PMID	34334590