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Structure and evolution of echo dense lesions in the neonatal brain. A combined ultrasound and necropsy study
Insights
Neonatal brain ultrasound can now distinguish periventricular leukomalacia and intraventricular hemorrhage. This aids in understanding cerebral lesions in low-birth-weight infants and improves diagnostic accuracy.
Area of Science:
- Neonatal neurology
- Pediatric radiology
- Neuroimaging
Background:
- Cerebral lesions are common in low-birth-weight infants.
- Distinguishing between different types of brain lesions is crucial for prognosis and management.
Purpose of the Study:
- To evaluate the accuracy of ultrasound in diagnosing cerebral lesions in neonates.
- To differentiate between periventricular leukomalacia and intraventricular hemorrhage.
- To assess the correlation between ultrasound and necropsy findings.
Main Methods:
- Combined ultrasound and necropsy study of infants with cerebral lesions.
- Analysis of 216 infants weighing less than 2 kg at birth.
- Correlation of imaging findings with post-mortem examination.
Main Results:
- Excellent correlation between ultrasound and necropsy findings.
- Ultrasound accurately distinguished periventricular leukomalacia from intraventricular hemorrhage.
- Identified that both lesions can coexist and that parenchymal extension may result from hemorrhage into ischemic tissue.
Conclusions:
- Neonatal brain ultrasound is effective in differentiating periventricular leukomalacia and intraventricular hemorrhage.
- The term 'periventricular hemorrhage' should be abandoned due to ambiguity.
- Accurate assessment of lesion nature and location is critical for advancing neonatal neuroimaging.
Abstract:
Sixty seven of 216 infants weighing less than 2 kg at birth had cerebral lesions on ultrasonic scanning. Eight of 17 who had periventricular leukomalacia, with or without subependymal or intraventricular haemorrhage, or both, died. These and one larger baby were the subject of a combined ultrasound, and where appropriate, necropsy study. There was excellent correlation between the ultrasound and necropsy findings, only some of the earlier lesions of periventricular leukomalacia being missed by ultrasound. The data suggest it is now possible to distinguish periventricular leukomalacia and subependymal/intraventricular haemorrhage by ultrasound, that both lesions may be present in the same brain, that apparent parenchymal extension of an intraventricular haemorrhage is more probably the result of haemorrhage into ischaemic periventricular tissue, and that the term 'periventricular haemorrhage' should be abandoned since it confuses two lesions of differing aetiology and differing clinical importance. Future advances in neonatal brain ultrasound depend on accurate assessment of both the nature and site of lesions within the cerebral hemispheres and ventricular system since the interpretation of these parameters is of critical importance.