An infarcted sigmoid appendix epiploica in a pregnant patient with left lower quadrant pain was identified as a hypoechoic extrauterine mass on ultrasound examination. Ultrasound can help identify more common causes of pain in pregnancy, such as ectopic pregnancy, placental abruption, or degeneration of a leiomyoma. When these are excluded, rare causes of abdominal pain in the pregnant patient, including infarcted appendix epiploica, need to be considered.
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