Fig. 13

Acute perforated appendicitis with abscess formation in a 66-year-old male patient presented with acute right iliac fossa pain, vomiting, and fever. Focused CT axial (a) and focused coronal (b) images following water enema and intravenous contrast injection CT abdomen and pelvis, showing inflamed appendix (red arrow) with its tip is seen continuous with an abscess containing gas bubbles (yellow arrows), free gas is seen at the retrocecal region (curved arrow) with related mild fat stranding (white arrowheads) and minimal free fluid collection (green arrowheads)