MR imaging for accurate prediction of outcome after perinatal arterial ischemic stroke : Sooner not necessarily better

Abstract

BACKGROUND: Involvement of the corticospinal tracts after perinatal arterial ischemic stroke (PAIS) is strongly correlated with adverse motor outcome. METHODS: Two full-term infants with PAIS, with two early MRI scans available, are reported. RESULTS: Diffusion weighted imaging (DWI)-MRI, performed within 24 h following onset of seizures and repeated 48 h later, clearly showed restricted diffusion within the middle cerebral artery territory on both MRIs, but clear patterns of signal intensity changes in the descending corticospinal tracts on the second MRI only. CONCLUSION: Since involvement of the corticospinal tracts is essential for prediction of motor outcome, we may need to reconsider optimal timing of MR imaging for prediction of neurodevelopmental outcome after PAIS