Case StudyPeriventricular haemorrhagic infarct in a preterm neonate
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Fetal and neonatal neuroimaging
2019, Handbook of Clinical NeurologyCitation Excerpt :Doppler ultrasound has shown reduced blood flow velocity in the terminal vein on the affected side (Taylor, 1995), suggesting impaired venous drainage. The periventricular hemorrhage is shown as a fan-shaped structure, due to obstructed medullary veins, of low signal intensity on T2-weighted imaging (Haddad et al., 1992; Counsell et al., 1999). Parenchymal hemorrhagic infarction results in interruption of projection and association fibers and oligodendroglial damage, which disrupts myelination.
Preterm Intraventricular Hemorrhage/Posthemorrhagic Hydrocephalus
2018, Volpe's Neurology of the NewbornPathogenesis of Germinal Matrix Hemorrhage
2017, Fetal and Neonatal Physiology, 2-Volume SetIntraventricular Hemorrhage in the Neonate
2011, Fetal and Neonatal Physiology E-Book, Fourth EditionIntracranial Hemorrhage in the Preterm Infant: Understanding It, Preventing It
2009, Clinics in PerinatologyCitation Excerpt :Doppler ultrasound can also be used for the imaging and flow velocity measurements of the terminal vein that is implicated in PVHI, but the clinical importance of this application remains undetermined. Although the superiority of MRI over CUS for the detection of associated white matter abnormalities and smaller size petechial hemorrhages is well recognized,24 its use in the early critical period during the first days of life25,26 is currently hindered by its limited availability, the logistics of transportation, concerns over sedation, and the high cost. These limitations hamper the clinical use of desirable sequences, such as diffusion, spectroscopy, and MR angiography, for the prediction and early detection of GM-IVH and its complications.
MRI of the newborn brain
2008, Paediatrics and Child HealthCitation Excerpt :Preterm infants may have lesions within the cerebral parenchymal such as periventricular leucomalacia, haemorrhagic parenchymal infarction or intraventricular haemorrhage with or without dilatation. Haemorrhagic infarction is seen as a fan-shaped area of low signal intensity surrounded by relative high signal intensity on T2-weighted imaging (Figure 11a).26 This area then undergoes cystic degeneration to form a porencephalic cyst by term age.27
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Correspondence: Ms S J Counsell, MRI Unit, Hammersmith Hospital, DuCane Road, London W12 0HS, UK