Vena Galeni malformation (VGM) is a rare congenital vascular malformation in the brain in which the Vena Galeni, a large cerebral vein, is atypically enlarged and directly connected to arteries. This can lead to considerable circulatory problems that cause cardiovascular stress, particularly in newborns. Hydrocephalus, i.e. "hydrocephalus", developmental delays and seizures often occur. The severity of the symptoms can vary greatly, which is why early diagnosis and treatment is crucial for the child's further development.