Epiploic Appendagitis: An Often Misdiagnosed Cause of Acute Abdomen

Epiploic appendages are peritoneal structures that arise from the outer serosal surface of the bowel wall towards the peritoneal pouch. They are filled with adipose tissue and contain a vascular stalk. Epiploic appendagitis is a rare cause of acute lower abdominal pain. It most commonly results from torsion and inflammation of the epiploic appendages, and its clinical features mimic acute diverticulitis or acute appendicitis resulting in being often misdiagnosed as diverticulitis or appendicitis. This frequently leads to unnecessary hospitalization, antibiotic administration, and unwarranted surgeries. Epiploic appendagitis is usually diagnosed with CT imaging, and the classic CT findings include: (i) fat-density ovoid lesion (hyperattenuating ring sign), (ii) mild bowel wall thickening, and (iii) a central high-attenuation focus within the fatty lesion (central dot sign). It is treated conservatively, and symptoms typically resolve in a few days. Therefore, epiploic appendagitis should be considered as one of the differential diagnosis for acute lower abdominal pain and prompt diagnosis of epiploic appendagitis can avoid unnecessary hospitalization and surgical intervention. In this case report, we discuss a 72-year-old woman who presented with a 2-day history of acute left lower abdominal pain.