Bouthillier classification of internal carotid artery segments

Last revised by Frank Gaillard on 8 Jun 2022

Alain Bouthillier et al. described a seven segment internal carotid artery classification system in 1996 1. It remains the most widely used system for describing the internal carotid artery segments.

A helpful mnemonic for remembering ICA segments is: 

  • C'mon Please Learn Carotid Clinical Organizing Classification


See also

There are a few other classification systems including those proposed by Fischer (1938), Gibo (1981), and Lasjaunias (1984) 2.

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