Vein of Galen disease

graph LR
    A(AV shunting) --> B(venous HTN) --> C(reduced CSF absorption) --> D(hydrocephalus) --> E(inc. ICP) --> F(developmental delay) --> G(mental retardation) --> H(ventriculomegally) --> I(macrocranium) 
    
    B --> A1(High outflow of blood) --> B1(Keep embryonic sinuses open) --> C1(Less blood flow thru jugular bulb and sigmoid sinus) --> D1(Stenosis of jugular bulb and sigmoid sinus)
    
			    A1--> B2(If the blood finds alternate route to exit brain) --> C2(drainage through ophthalmic vein) --> D2(exophthalmos, epistaxis)
			    
    B --> C3(Dec cerebral blood flow to normal brain) --> D3("Brain parenchyma subacutely and progressively destroyed (mainly in the white matter)") --> E3(Melting brain syndrome)

Vein of Galen malformation

Vein of Galen Dilation
Vein of Galen Varix