FIGURE 116.2 Appendicitis Longitudinal (A ) and transverse (B ) images of the appendix demonstrate thickening of the wall (arrows ) consistent with appendicitis C, D : Longitudinal images of two different patients with a dilated, inflamed appendix, with a thickened wall and dilatation of the appendiceal lumen E : Longitudinal image of an inflamed appendix containing an echogenic appendicolith (arrows ) F : Longitudinal image demonstrates hyperemia within an inflamed appendix consistent with appendicitis (A–D, F, Reprinted with permission from Kawamura D, Nolan T Abdomen and Superficial Structures 4th ed Philadelphia, PA: Wolters Kluwer Health; 2017.)