SSS-TOAST classification and cerebral infarction lesions in 516 ischemic minor stroke patients
YOU Wenxia
ZHONG Jianping
OUYANG Jipeng
LI Hongzhuang
YANG Shaomin
HU Qiugen
Abstract：Objective To observe the SSS-TOAST classification and to analyze the characteristics of cerebral infarction lesions in 516 patients with ischemic minor stroke.Methods The SSS-TOAST classification and lesions analysis were performed in 516 patients with ischemic minor stroke.The data including age,Essen stroke risk scale (ESRS) score,90 d modified Rankin scale (mRS) score,head magnetic resonance imaging (MRI) + magnetic resonance angiography (MRA) + diffusion-weighted imaging (DWI),and cervical vascular examination,etc.were collected.Then we did comparisons between the different SSS-TOAST sub-types.Results The SSS-TOAST classification showed that: there were 174 (33.72%) patients with large-artery atherosclerosis subtype,39 (7.56%) patients with cardioembolism subtype,229 (44.38%) patients with small-artery occlusion subtype,11 (2.13%) patients with other determined etiology subtype,and 63 (12.21%) patients with undetermined cause subtype.The main subtypes were small-artery occlusion and large-artery atherosclerosis.We compared these two subtypes and found that patients with large artery atherosclerosis subtype had more arteriostenosis and bad outcomes at 90 d mRS (all P<0.05).Totally 357 (69.19%) patients had isolated lesions,and the isolated lesions of 231 (64.71%) cases occurred mainly in subcortical location,deep white matter,and basal ganglia;159 (30.81%) patients had multiple lesions.The diameter (or sum) of lesion in 282 (54.65%) patients was less than 20 mm,and 234 (45.35%) patients'' lesion diameter (or sum) was ≥20 mm.These cerebral infarction lesions in patients with ischemic minor stroke were mostly isolated,diameter< 20 mm,and the isolated lesions were mostly found in common locations (all P<0.05).Conclusions The main SSS-TOAST subtypes are large-artery atherosclerosis and small-artery occlusion in patients with ischemic minor stroke,the ratios of arteriostenosis and bad outcomes mainly occur in patients with large-artery atherosclerosis subtype.These cerebral infarction lesions are mostly isolated and found in common locations.However,some patients have infarction diameter≥20 mm and multiple infarction.
Keywords：cerebral infarctionischemic minor strokelarge-artery atherosclerosissmall artery occlusion
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 9-13 )