Cerebral microbleeds: Causes, clinical relevance, and imaging approach - A narrative review.

IF 0.8 Q4 CLINICAL NEUROLOGY Journal of Neurosciences in Rural Practice Pub Date : 2024-04-01 Epub Date: 2024-03-08 DOI:10.25259/JNRP_351_2023
Amit Agarwal, Pranav Ajmera, Preetika Sharma, Sangam Kanekar
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Abstract

With advances in magnetic resonance imaging (MRI) sequences, there has been increased identification of microbleed/microhemorrhage across different population ages, but more commonly in the older age group. These are defined as focal areas of signal loss on gradient echo MRI sequences (T2* and susceptibility-weighted images), which are usually <5 mm in size representing hemosiderin deposition with wide ranges of etiologies. Susceptibility-weighted imaging (SWI) has become a routine MRI sequence for practices across the globe resulting in better identification of these entities. Over the past decade, there has been a better understanding of the clinical significance of microbleeds including their prognostic value in ischemic and hemorrhagic stroke. Cerebral amyloid angiopathy and hypertension are the two most common causes of microbleeds following peripheral and central pattern, respectively. In the younger age group, microbleeds are more common due to familial conditions or a wide range of hypercoagulable states. This review outlines the pathophysiology, prevalence, and clinical implications of cerebral microhemorrhage along with a brief discussion about the technical considerations of SWI.

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脑微出血:原因、临床相关性和成像方法 - 综述。
随着磁共振成像(MRI)序列的发展,微出血/微出血的识别率在不同年龄段的人群中都有所提高,但在老年群体中更为常见。微出血是指在梯度回波磁共振成像序列(T2*和感度加权图像)上出现的信号缺失灶,通常表现为以下特征
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CiteScore
2.10
自引率
0.00%
发文量
129
审稿时长
22 weeks
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