Overview
Vein of Galen malformation (VGAM) is a rare congenital cerebrovascular anomaly characterized by aneurysmal dilatations of the vein of Galen and its tributaries, often leading to high morbidity and mortality, particularly in neonates 12.Diagnosis
Key Diagnostic Criteria: Dilatation of the vein of Galen and associated sinuses, often identified via cranial ultrasound, MRI, and CT angiography 145.
Recommended Tests:
- Cranial ultrasound for initial detection 4.
- MRI and MR angiography for detailed vascular assessment 5.
- CT angiography to rule out arteriovenous shunts 24.
Differentiation:
- Vein of Galen varix (VGV) lacks arteriovenous shunts and often resolves with treatment of underlying cardiac failure 2.
- Intracerebral arteriovenous fistulas with intraparenchymal varix should be distinguished from VGAM 7.Management
First-Line Treatments:
- Endovascular embolization to occlude the aneurysmal sac and feeding arteries 136.
- Management of aortic steal syndrome through hemodynamic monitoring and intervention 1.
Adjunctive Treatments:
- Treatment of associated conditions like patent ductus arteriosus with indomethacin 4.
- Surgical interventions for complex cases or complications such as hemorrhage 6.
Monitoring Parameters:
- Superior vena cava (SVC) flow measurements to assess hemodynamic impact and response to treatment 3.
- Bicêtre neonatal evaluation score (BNES) and neonatal multiple organ dysfunction score (NeoMODS) to evaluate organ dysfunction 1.Special Populations
Pediatrics: Neonates with VGAM often present with cardiac failure, pulmonary hypertension, and neurological symptoms requiring urgent intervention 23.
Comorbidities: Presence of aortic steal syndrome correlates with worse outcomes, including acute organ dysfunction and mortality 1.Key Recommendations
Monitor SVC flow in neonates with VGAM to guide treatment and predict outcomes (Evidence: Moderate 3).
Perform endovascular embolization for symptomatic VGAM to reduce hemodynamic burden and improve survival (Evidence: Moderate 136).
Differentiate VGAM from vein of Galen varix to tailor appropriate management, focusing on cardiac support in VGV cases (Evidence: Expert opinion 2).References
1 Schwarz S, Brevis Nuñez F, Dürr NR, Schlunz-Hendann M, Brassel F, Felderhoff-Müser U et al.. Aortic Steal Correlates with Acute Organ Dysfunction and Short-Term Outcomes in Neonates with Vein of Galen Malformation. Neonatology 2024. link
2 Mochizuki Y, Niimi Y, Sato S, Inoue T, Kuwamoto K, Shima S et al.. Clinical Course and Management of Vein of Galen Varix of the Neonate: A Case Report and Literature Review. Pediatric neurosurgery 2019. link
3 Heuchan AM, Bhattacharyha J. Superior vena cava flow and management of neonates with vein of Galen malformation. Archives of disease in childhood. Fetal and neonatal edition 2012. link
4 Komiyama M, Kitano S, Sakamoto H, Ehara E, Miyagi N, Kusuda S. Rapid normalization of marked dilatation of the cerebral duro-venous system in a newborn infant mimicking a great vein of Galen varix. Pediatric neurosurgery 2001. link
5 Fellner F, Fellner C, Böhm-Jurkovic H, Blank M, Bautz W. MR diagnosis of vein of Galen aneurysmal malformations using virtual cisternoscopy. Computerized medical imaging and graphics : the official journal of the Computerized Medical Imaging Society 1999. link00027-0)
6 Halbach VV, Dowd CF, Higashida RT, Balousek PA, Ciricillo SF, Edwards MS. Endovascular treatment of mural-type vein of Galen malformations. Journal of neurosurgery 1998. link
7 Barnwell SL, Ciricillo SF, Halbach VV, Edwards MS, Cogen PH. Intracerebral arteriovenous fistulas associated with intraparenchymal varix in childhood: case reports. Neurosurgery 1990. link