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 :Almost a decade later, Taylor89 found decreased flow velocity and displacement of the ipsilateral terminal vein using Doppler in living infants with PVHI (Fig. 2). Perivascular hemorrhage and presumed intravascular thrombi along the medullary veins were subsequently demonstrated in an MRI study by Counsell and colleagues,26 confirming original pathologic studies that suggested intravascular thrombi in the medullary veins.88 Govaert and colleagues90 and Dudink and colleagues91 suggested that the pathogenesis of temporal and parietotemporal (atrial) distribution PVHIs may not stem from terminal vein involvement but rather are secondary to involvement of the inferior ventricular and lateral atrial veins, respectively.
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