Vertebrobasilar dolichoectasia

Introduction
Vertebrobasilar dolichoectasia (VBD) is a disorder in which the distal vertebral and basilar arteries develop pathological elongation, twisting, and dilation. The basilar artery is involved in more than 80% of cases.

Diagnostic criteria (proposed)
Smoker et al. proposed these diagnostic criteria in 1986:

Complications
Subarachnoid hemorrhage has been reported to occur rarely in this condition.