PT - JOURNAL ARTICLE AU - E. Johansson AU - A.J. Fox TI - Carotid Near-Occlusion: A Comprehensive Review, Part 1—Definition, Terminology, and Diagnosis AID - 10.3174/ajnr.A4432 DP - 2016 Jan 01 TA - American Journal of Neuroradiology PG - 2--10 VI - 37 IP - 1 4099 - http://www.ajnr.org/content/37/1/2.short 4100 - http://www.ajnr.org/content/37/1/2.full SO - Am. J. Neuroradiol.2016 Jan 01; 37 AB - SUMMARY: 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.ECAexternal carotid artery