Low-grade IVH in preterm infants causes cerebellar damage, motor, and cognitive impairment.

BACKGROUND Few studies have examined the effect of low-grade intraventricular hemorrhage (IVH) on the white matter in the cerebellum and its association with neurodevelopment. We evaluated cerebellar white matter at term-equivalent age (TEA) in preterm infants with low-grade IVH. Furthermore, we assessed neurodevelopmental outcomes at three years of age to examine the influence of low-grade IVH on neurodevelopment. METHODS Thirteen infants with low-grade IVH and 26 without IVH, born at <30 weeks' postmenstrual age (PMA), were enrolled in this study. Diffusion tensor imaging (DTI) parameters, including fractional anisotropy (FA) and apparent diffusion coefficient (ADC) in the middle and superior cerebellar peduncles (SCP), were measured. Neurodevelopmental outcomes at three years of age were assessed and the correlation between DTI parameters and developmental quotient (DQ) was analyzed. RESULTS Preterm infants with IVH showed lower FA values (p<0.01) and higher ADC values (p<0.05) in the SCP at TEA than the no-IVH group. Lower Postural-Motor and Cognitive-Adaptive DQ at three years of age were observed in the IVH compared to the no-IVH group. A significant correlation between the FA values in the SCP at TEA and the Posture-Motor DQ was observed at three years of age (p=0.043, r=0.50). CONCLUSIONS These data suggest that low-grade IVH in preterm infants affects the SCP at TEA, and that impaired cerebellar white matter correlates with poor motor development at three years of age.