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Neuropathology of cerebral arteriovenous malformations in children
Insights
Neuropathological changes in pediatric cerebral arteriovenous malformations (cAVMs) worsen with age. Older children show more severe vascular and neural damage compared to younger children and infants.
Area of Science:
- Neuropathology
- Pediatric Neurology
- Vascular Malformations
Background:
- Cerebral arteriovenous malformations (cAVMs) are complex vascular anomalies.
- Understanding age-related neuropathological changes in pediatric cAVMs is crucial for diagnosis and management.
Purpose of the Study:
- To compare neuropathological findings in pediatric cAVMs across different age groups.
- To identify age-dependent alterations in cAVMs and associated brain tissue.
Main Methods:
- Histopathological examination of brain tissue from pediatric cAVM patients.
- Comparison of findings between children under 6 years and those aged 6 to 15 years.
- Analysis of vascular and neural tissue abnormalities.
Main Results:
- Abnormalities were more pronounced in distal shunting vessels and veins than arteries in all subjects.
- Older children (6-15 years) exhibited more frequent fibrous thickening, calcification, thrombus, gliosis, and haemosiderin deposition.
- Infants (<1 week) presented with congestive heart failure and watershed infarction; older infants (>1 week) showed hydrocephalus, venous thrombosis, and hemorrhagic infarction.
Conclusions:
- Age significantly influences the neuropathological manifestations of pediatric cerebral arteriovenous malformations.
- Progressive vascular and neural damage occurs with increasing age in cAVMs.
- Distinct clinical and pathological presentations are observed in neonates versus older children with cAVMs.
Abstract:
Neuropathological findings in children who had died of cerebral arteriovenous malformation under 6 years of age were contrasted with those of children aged 6 to 15 years. In all subjects, the abnormalities were more marked in the shunting vessels and veins distal to the arteriovenous shunt than in the arteries. Fibrous thickening, calcification an adherent thrombus of vessel wall, and gliosis and haemosiderin in contiguous neural tissue were more common in the older than the younger children. Children less than 1 week old with vein of Galen malformations presented with congestive heart failure and "watershed" cerebral infarction; most of those over one week old had hydrocephalus and venous thrombosis with haemorrhagic infarction.