A 72-year-old woman had abdominal pain, nausea, vomiting, and fever. An appendectomy had been performed 50 years earlier. Physical examination was notable only for periumbilical pain and abdominal rigidity. No abdominal mass or vascular sounds were noted. The white blood cell count was 21,000. Liver function studies and urinalysis were normal. An abdominal ultrasound showed no sign Perforated Meckel’s diverticulum