ArticleExperimental neurology2026
Cerebral vascular tortuosity and aneurysm formation and rupture: a novel vessel tortuosity scale.
Article in Experimental neurology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Cerebral aneurysm (CA) rupture is the most common cause of nontraumatic subarachnoid hemorrhage. Recent data suggests that tortuosity is associated with aneurysm formation and rupture risk. We aimed to determine if tortuosity correlates with CA development and rupture in a mouse CA model and to develop a novel tortuosity scale to be used for in vivo CA studies. A highly validated, elastase-mouse CA model was used to assess cerebral vessel tortuosity with CA formation and rupture in sham and elastase groups. A 4-point ordinal scale was created to evaluate predictive capacity for vessel tortuosity level and CA formation and rupture. Nearly all sham animals (92 %) had little to no vessel tortuosity on the visual scale (median, IQR: 1, [1-2]), compared to 24 % in the elastase groups (2, [2-3]) (p = 0.001). Sham cohorts had zero animals with highly tortuous vessels, while 3.5 mU and 35 mU cohorts had >35 % of animals with significant visual tortuosity, p = 0.003 and p < 0.000, respectively. CA formation and rupture was higher in the elastase groups compared to the sham group (p = 0.002). Both the visual scale and tortuosity index significantly predicted CA formation (p < 0.001) and rupture (p < 0.001). A novel tortuosity scale is highly predictive of CA formation and rupture in vivo. It may offer a new measurement to better understand vessel stress in the pathogenesis and progression of CAs.
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