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Brain injuries in early foetal life: consequences for brain development
J Mancini1, V Lethel, C Hugonenq
1Department of Paediatric Neurology, Paediatric University Hospital, La Timone, Marseille, France.
Insights
Prenatal insults like trauma or amniocentesis can cause fetal brain malformations such as schizencephaly and cerebellar agenesis. These conditions may stem from ischemic or traumatic events during fetal development.
Area of Science:
- Neuroscience
- Developmental Biology
- Pediatric Neurology
Background:
- Learning disability and cerebral palsy are frequently linked to prenatal factors.
- Understanding the precise timing and nature of fetal insults is crucial for diagnosis and prevention.
Observation:
- Three cases are presented: two with schizencephaly and one with unilateral cerebellar agenesis.
- Case 1: Maternal trauma at 16 weeks gestation led to fetal schizencephaly and left hemiplegia.
- Case 2: Amniocentesis at 16 weeks gestation may have caused fetal schizencephaly.
- Case 3: Fetal cerebellar trauma at 19 weeks gestation resulted in unilateral cerebellar agenesis.
Findings:
- The timing of fetal insults (trauma, amniocentesis) correlated with specific brain malformations.
- Schizencephaly was observed in infants following trauma or amniocentesis around 16 weeks gestation.
- Unilateral cerebellar agenesis was linked to a hemorrhagic event from cerebellar trauma at 19 weeks gestation.
Implications:
- Prenatal events, including trauma and invasive procedures, can cause significant fetal brain malformations.
- Ischemic or traumatic mechanisms are proposed as underlying causes for these developmental anomalies.
- This research highlights the vulnerability of the developing fetal brain to external insults.
Abstract:
Learning disability and cerebral palsy are often related to factors present before birth. We report three patients (two with schizencephaly, one with unilateral cerebellar agenesis) in whom the timing of an insult to the foetus was known. In the first case, the mother had a trauma at 16 weeks of pregnancy and schizencephaly was discovered in the male infant associated with a left hemiplegia. In the second child, amniocentesis performed at 16 weeks into pregnancy may have been responsible for the same cortical anomaly. In the third case, sequential foetal echographies clearly demonstrated that an apparent unilateral cerebellar agenesis was related to an haemorrhagic event secondary to cerebellar trauma that occurred at 19 weeks of pregnancy. It is suggested that these brain malformations are related to an ischemic mechanism or a traumatic event in foetal life.