Surgical treatment of segmental occlusion of the internal carotid artery

According to Kniemeyer et al, type II occlusion of the internal carotid artery (ICA) represents a total occlusion of the ICA at the carotid bifurcation, with delayed retrograde filling of the cervical portion and the siphon via atypical collaterals of the proximal ICA.1 This paper presents a case of a 56-year-old male with symptomatic near-total occlusion of the right ICA and segmental occlusion of the left ICA, wherein an aberrant vessel originating from the left ICA provided blood flow to the proximal part of the ICA.