A serpentine aneurysm (Serpentine Aneurysm) is a subtype of a giant aneurysm[^1].
Definition
A serpentine aneurysm consists of a partially thrombosed giant aneurysm (≥ 25 mm in diameter) traversed by a continuous, tortuous intra-aneurysmal vascular channel. This vascular channel has an entry and an exit point, distinguishing it from a typical giant aneurysm, which has no exit point.
Location
Involved artery[^3] | Percentage % |
50 % | |
18 % | |
Vertebral artery / Vertebrobasilar junction | 15 % |
13 % | |
3 % |
Imaging
A pathognomonic imaging sign of a serpentine giant aneurysm is the so-called Pretzel Sign on digital subtraction angiography[^2].
