Ultrasonography of normal and abnormal appendix in children

Figure 9 An 8-year-old male with perforated appendicitis. A: Initial US showed a collapsed appendix with distal wall defect (short arrows) and periappendiceal fluid collection (medium sized arrows) in the deep right lower abdomen. In addition, marked mesenteric inflammatory change (long arrows) was seen; B: Subsequent axial CT scan revealed loculated fluid (short arrows) corresponding to the periappendiceal fluid collection on US and marked mesenteric fat change (long arrow) in the right lower abdomen.