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Fig. 2B. —23-year-old woman who presented to emergency department with acute right lower quadrant pain. On contrast-enhanced MDCT scans, appendix is not visualized. Patient has paucity of pericecal fat, so score of 0 was assigned. Oral contrast material did not reach region of cecum in this patient. She underwent surgery on the basis of high clinical suspicion for acute appendicitis, which was confirmed by intraoperative findings and surgical pathology.