CT scan was performed in 29 patients (83%) (Table 2) and
revealed various amounts of intra-abdominal fluid collections, as
well as intestinal edema, but no obvious cause of infection such
as appendicitis, diverticulitis or perforation. The lack of an infectious
focus led to the suspicion of primary peritonitis only in 2
patients whereas 34 patients (97%) were taken to the operating
room despite negative results of the CT scan (Table 2).