“…In previous studies (2-4), multiple vascular channels which run distinctly outside of the expected lumen of occluded arteries were generally recognized as bridging collaterals developed from VV. In the process of maturation, the adventitial collaterals grow both in width and length and therefore develop a typical corkscrew-like or beadlike morphology (5,6), which are not consistent with the angiography presented by the authors.…”