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A 56-year-old man was transferred to the emergency department complaining of right lower quadrant pain of 3 days duration. The Maximal tender area was the slightly upper part of the abdomen up to McBurney’s point. We ordered CT to evaluate for several disease such as appendicitis, diverticulitis and primary epiploic appendagitis, and the patient was diagnosed with omental infarct based on the CT finding. After five days of supportive care, the symptoms were resolved. Omental infarct is a rare cause of acute abdominal pain, which is often misdiagnosed as acute appendicitis when it presents with right lower quadrant pain. Although surgical resection is required in severe cases, most cases are successfully managed with supportive treatment. The emergency physician should consider omental infarct as a differential diagnosis in patients with right lower quadrant pain.


A 56-year-old man was transferred to the emergency department complaining of right lower quadrant pain of 3 days duration. The Maximal tender area was the slightly upper part of the abdomen up to McBurney’s point. We ordered CT to evaluate for several disease such as appendicitis, diverticulitis and primary epiploic appendagitis, and the patient was diagnosed with omental infarct based on the CT finding. After five days of supportive care, the symptoms were resolved. Omental infarct is a rare cause of acute abdominal pain, which is often misdiagnosed as acute appendicitis when it presents with right lower quadrant pain. Although surgical resection is required in severe cases, most cases are successfully managed with supportive treatment. The emergency physician should consider omental infarct as a differential diagnosis in patients with right lower quadrant pain.