Differential diagnosis of left-sided abdominal pain: Primary epiploic appendagitis vs colonic diverticulitis

Figure 1 Computer tomography image of a 31-year-old man who presented with acute left lower quadrant pain. A: A 31-year-old man who presented with acute left lower quadrant pain. An oval fatty mass with a hyperattenuated ring and surrounding inflammation adjacent to the sigmoid colon (arrow) is noted. The lesion corresponds to the site of tenderness and is characteristic of primary epiploic appendagitis. B: A 48-year-old female who presented with left lower quadrant pain. An ovoid fat attenuated mass with a central high attenuation area within the inflamed epiploic appendage in the distal descending colon (arrow) is shown.