School ager with fevers who is 1 week postop from surgery for perforated appendicitis

CT of abdominal abscesses
Axial CT with contrast of the abdomen and pelvis shows low density fluid collections with enhancing rims anterior to the spleen (above), in the right pelvis (middle) and posterior to the bladder and anterior to the rectum (below).

The diagnosis was perisplenic, pelvic, and perirectal abdominal abscesses due to perforated appendicitis.