Acute appendagitis as a cause of right lower quadrant pain

Primary epiploic appendagitis is a rare, benign, self-limiting, inflammatory process of the colonic epiploic appendices.1 With the increased use of CT by the emergency department to investigate RLQ pain, this entity will be found more often by an experienced radiologist. Awareness of the CT appearance of acute appcndagitis may help avoid an unnecessary operation since the management of this condition is expectant. All of the diagnostic experience of appendagitis on CT comes from investigation of left lower quadrant pain. However, there is no reason why this experience cannot be transferred to the interpretation of rightsided pain. Ultrasonography shows the characteristic finding of a hyperechoic mass localized under the point of maximum pain.2 CT typically shows a pericolic fatty mass with a greater attenuation than normal abdominal fat.3