Shamik B Trivedi1, Zachary A Vesoulis2, Rakesh Rao2, Steve M Liao2, Joshua S Shimony3, Robert C McKinstry3, Amit M Mathur2. 1. Division of Newborn Medicine, Edward Mallinckrodt Department of Pediatrics,, Washington University School of Medicine, One Children's Place, Campus Box 8116,, St. Louis, MO, 63110, USA. Trivedi_S@kids.wustl.edu. 2. Division of Newborn Medicine, Edward Mallinckrodt Department of Pediatrics,, Washington University School of Medicine, One Children's Place, Campus Box 8116,, St. Louis, MO, 63110, USA. 3. Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, MO, USA.
Abstract
BACKGROUND: Deep nuclear gray matter injury in neonatal hypoxic-ischemic encephalopathy (HIE) is associated with worse neurodevelopmental outcomes. We previously published a qualitative MRI injury scoring system utilizing serial T1-weighted, T2-weighted and diffusion-weighted imaging (DWI), weighted for deep nuclear gray matter injury. OBJECTIVES: To establish the validity of the MRI scoring system with neurodevelopmental outcome at 18-24 months. MATERIALS AND METHODS: MRI scans from neonates with moderate to severe HIE treated with therapeutic hypothermia were evaluated. Signal abnormality was scored on T1-weighted, T2-weighted and DWI sequences and assessed using an established system in five regions: (a) subcortical: caudate nucleus, globus pallidus and putamen, thalamus and the posterior limb of the internal capsule; (b) white matter; (c) cortex, (d) cerebellum and (e) brainstem. MRI injury was graded as none, mild, moderate or severe. Inter-rater reliability was tested on a subset of scans by two independent and blinded neuroradiologists. Surviving infants underwent the Bayley Scales of Infant and Toddler Development-III (Bayley-III) at 18-24 months. Data were analyzed using univariate and multivariate linear and logistic regression. RESULTS: Fifty-seven eligible neonates underwent at least one MRI scan in the first 2 weeks of life. Mean postnatal age at scan 1 was 4±2 days in 50/57 (88%) neonates and 48/54 (89%) surviving infants underwent scan 2 at 10±2 days. In 54/57 (95%) survivors, higher MRI injury grades were significantly associated with worse outcomes in the cognitive, motor and language domains of the Bayley-III. CONCLUSION: A qualitative MRI injury scoring system weighted for deep nuclear gray matter injury is a significant predictor of neurodevelopmental outcome at 18-24 months in neonates with HIE.
BACKGROUND: Deep nuclear gray matter injury in neonatal hypoxic-ischemicencephalopathy (HIE) is associated with worse neurodevelopmental outcomes. We previously published a qualitative MRI injury scoring system utilizing serial T1-weighted, T2-weighted and diffusion-weighted imaging (DWI), weighted for deep nuclear gray matter injury. OBJECTIVES: To establish the validity of the MRI scoring system with neurodevelopmental outcome at 18-24 months. MATERIALS AND METHODS: MRI scans from neonates with moderate to severe HIE treated with therapeutic hypothermia were evaluated. Signal abnormality was scored on T1-weighted, T2-weighted and DWI sequences and assessed using an established system in five regions: (a) subcortical: caudate nucleus, globus pallidus and putamen, thalamus and the posterior limb of the internal capsule; (b) white matter; (c) cortex, (d) cerebellum and (e) brainstem. MRI injury was graded as none, mild, moderate or severe. Inter-rater reliability was tested on a subset of scans by two independent and blinded neuroradiologists. Surviving infants underwent the Bayley Scales of Infant and Toddler Development-III (Bayley-III) at 18-24 months. Data were analyzed using univariate and multivariate linear and logistic regression. RESULTS: Fifty-seven eligible neonates underwent at least one MRI scan in the first 2 weeks of life. Mean postnatal age at scan 1 was 4±2 days in 50/57 (88%) neonates and 48/54 (89%) surviving infants underwent scan 2 at 10±2 days. In 54/57 (95%) survivors, higher MRI injury grades were significantly associated with worse outcomes in the cognitive, motor and language domains of the Bayley-III. CONCLUSION: A qualitative MRI injury scoring system weighted for deep nuclear gray matter injury is a significant predictor of neurodevelopmental outcome at 18-24 months in neonates with HIE.
Entities:
Keywords:
Brain; Hypoxic-ischemic encephalopathy; Magnetic resonance imaging; Neonates; Neurodevelopmental outcome; Scoring system
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