What is the most common brain injury in preterm infants?

What is the most common brain injury in preterm infants?

• A. Intraventricular hemorrhage
• B. Cerebral palsy
• C. Periventricular leukomalacia (PVL)
• D. Hypoxic-ischemic encephalopathy

Answer: (C)

Periventricular leukomalacia arises from injury to the developing white matter around the brain’s ventricles in very preterm infants. This region is especially vulnerable because the preterm brain has immature oligodendrocyte precursors that are critical for myelination and are highly sensitive to hypoxia-ischemia and inflammatory insults. When these cells are damaged, the periventricular white matter doesn’t myelinate properly, leading to PVL with areas of necrosis or cystic change. This pattern is the most commonly identified brain injury in preterm infants and is a major contributor to later motor problems, such as cerebral palsy, typically affecting leg movement (spastic diplegia) due to disruption of the corticospinal tracts near the ventricles. Intraventricular hemorrhage also occurs in preterms because the germinal matrix vessels are fragile, but PVL represents the more characteristic and prevalent white-matter injury pattern. Hypoxic-ischemic encephalopathy is more commonly linked to term infants with perinatal asphyxia, making it less typical in the preterm population. Cerebral palsy is a potential outcome of PVL, not the injury pattern itself.

Periventricular leukomalacia arises from injury to the developing white matter around the brain’s ventricles in very preterm infants. This region is especially vulnerable because the preterm brain has immature oligodendrocyte precursors that are critical for myelination and are highly sensitive to hypoxia-ischemia and inflammatory insults. When these cells are damaged, the periventricular white matter doesn’t myelinate properly, leading to PVL with areas of necrosis or cystic change. This pattern is the most commonly identified brain injury in preterm infants and is a major contributor to later motor problems, such as cerebral palsy, typically affecting leg movement (spastic diplegia) due to disruption of the corticospinal tracts near the ventricles. Intraventricular hemorrhage also occurs in preterms because the germinal matrix vessels are fragile, but PVL represents the more characteristic and prevalent white-matter injury pattern. Hypoxic-ischemic encephalopathy is more commonly linked to term infants with perinatal asphyxia, making it less typical in the preterm population. Cerebral palsy is a potential outcome of PVL, not the injury pattern itself.