[Analysis of clinical and imaging characteristics of neonatal arterial ischemic stroke with different long-term motor function prognoses].

<b>Objective:</b> To explore baseline clinical and imaging characteristics of children with neonatal arterial ischaemic stroke based on their long-term motor function prognoses. <b>Methods:</b> A retrospective cohort study was conducted. Clinical data, including magnetic resonance imaging (MRI) and electroencephalogram (EEG) findings, were collected from 31 neonates diagnosed with ischemic stroke admitted to the Department of Neonataology, Maternal and Child Health Hospital of Hubei Province between January 2015 and December 2019. Unified follow-up was conducted between May and July 2024. Long-term motor function outcomes were assessed using the modified Rankin scale(mRS) and categorized into two groups: the good motor function group (mRS score 0-1) and the motor impairment group (mRS score≥2).Baseline clinical and imaging data were summarized for all children, and differences between the two groups were analyzed using the Mann-Whitney <i>U</i> test and Fisher's exact test. <b>Results:</b> A total of 31 neonates (21 males, 10 females) with an admission age of 1-19 days, all diagnosed within 28 days of birth, were included. At follow-up, 4-8 years after disease onset, 26 neonates (84%) showed good motor function, while 5 (16%) had motor impairments. Compared to the good motor function group, the motor impairment group had higher proportions of females (4/5 <i>vs.</i> 23% (6/26)), main middle cerebral artery (MCA) infarction (4/5 <i>vs.</i> 19% (5/26)), basal ganglia involvement (4/5 <i>vs.</i> 27% (7/26)), corticospinal tract involvement (posterior limb of internal capsule (PLIC) 5/5 <i>vs.</i> 38% (10/26) and cerebral peduncles 5/5 <i>vs.</i> 31% (8/26)) shown by MRI images, and meconium-stained amniotic fluid (4/5 <i>vs.</i> 15% (4/26))(all <i>P<</i>0.05).No significant differences were observed in gestational age, birth weight, abnormalities in muscle tone or primitive reflexes at admission or discharge, or abnormal EEG findings (all <i>P></i>0.05). <b>Conclusions:</b> Neonatal arterial ischemic stroke commonly manifests as seizures, which are generally controllable, with a relatively stable clinical course and a low incidence of long-term motor impairment. Children with long-term motor impairments are more likely to have main MCA infarction, basal ganglia and corticospinal tract involvement (PLIC and cerebral peduncles), as well as meconium-stained amniotic fluid. This condition is also more commonly observed in females.