Carotid near-occlusion is distal ICA luminal collapse beyond a tight stenosis, where the distal lumen should not be used for calculating percentage stenosis. Near-occlusion with full ICA collapse is well-known, with a threadlike lumen. However, near-occlusion without collapse is often subtle and can be overlooked as a usual severe stenosis. More than 10 different terms have been used to describe near-occlusion, sometimes causing confusion. This systematic review presents what is known about carotid near-occlusion. In this first part, the foci are definition, terminology, and diagnosis.
Johansson, E., & Fox, A. J. (2016, January 1). Carotid near-occlusion: A comprehensive review, part 1 - Definition, terminology, and diagnosis. American Journal of Neuroradiology. American Society of Neuroradiology. https://doi.org/10.3174/ajnr.A4432