Appendicitis is the most common abdominal emergency occurring in 7%–12% of the population. The aim of this article was to pictorially present the spectrum of appendix and acute appendicitis appearances on computed tomography (CT). The various appearances on CT of the normal appendix are shown as well as the CT criteria for the differentiation of perforated and non-perforated appendicitis.

Keywords: appendix • appendicitis • computed tomography