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Brain damage in the premature infant. Early lesions and new aspects of sequelae
Insights
Cerebral damage, including intraventricular hemorrhage (IVH) and leukomalacia, remains a key concern in premature infants. Advanced imaging like CT and US improve IVH diagnosis, but leukomalacia diagnosis is still uncertain.
Area of Science:
- Neonatal neurology
- Pediatric neuroimaging
- Perinatal brain injury
Background:
- Cerebral damage in premature infants, specifically intraventricular hemorrhage (IVH) and white matter necrosis (leukomalacia), is a major concern despite reduced neonatal mortality.
- While early morphological aspects of these lesions were known, advancements in imaging have spurred renewed interest and improved recognition of IVH.
Purpose of the Study:
- To review the current understanding of cerebral lesions in premature infants, focusing on intraventricular hemorrhage (IVH) and leukomalacia.
- To highlight the impact of advanced imaging techniques on the diagnosis and recognition of these neonatal brain injuries.
Main Methods:
- Review of existing literature on neonatal cerebral lesions.
- Discussion of the role of computerized tomography (CT) and ultrasonography (US) in diagnosing intraventricular hemorrhage (IVH).
- Analysis of the challenges in early diagnosis of leukomalacia and the natural history of brain lesions in infants requiring mechanical ventilation.
Main Results:
- Computerized tomography (CT) and ultrasonography (US) enable accurate assessment of IVH localization, extent, and frequency.
- Early diagnosis of leukomalacia remains challenging.
- Long-term survival with mechanical ventilation has revealed common findings of posthemorrhagic hydrocephalus, centrum semiovale sclerosis, and multicystic encephalopathy at autopsy.
Conclusions:
- Advanced imaging has significantly improved the diagnosis and understanding of intraventricular hemorrhage (IVH) in premature infants.
- Further research is needed to improve the early diagnosis of leukomalacia.
- The natural history of neonatal brain lesions, particularly in infants requiring mechanical ventilation, includes complications like hydrocephalus and encephalopathy.
Abstract:
In spite of a significant decrease of the mortality and morbidity of neonates, cerebral damage in the premature infant remains the major concern for the neonatologist. Intraventricular hemorrhage (IVH) and necrosis of the white matter (leukomalacia) are the two main lesions. Early morphological aspects have been known for many years, but the use of computerized tomography (CT scan) and ultrasonography (US) through the anterior fontanelle have led to renewed interest and the general recognition of IVH. Localization, extent and frequency of the lesions can readily be established. However the early diagnosis of leukomalacia is still uncertain. Long survival, with mechanical ventilation of severely ill infants, has made it possible to follow the natural history of the lesions and has modified the relative frequency of their occurrence. Posthemorrhagic hydrocephalus, sclerosis of the centrum semiovale and multicystic encephalopathy are now commonly found at autopsy of infants who have survived for several weeks.