The term<unk> means elongation and distension. It is used to characterize arteries throughout the human body which have shown significant deterioration of their tunica intima (and occasionally the tunica media), weakening the vessel walls and causing the artery to elongate and distend.
Intracranial dolichoectasias
Vein of Galen aneurysmal malformations
Chiari malformation
Porencephaly
Periventricular leukomalacia
Hydrocephalus
Cavernous venous malformation
Intraventricular hemorrhage