LAUSR

Background Acute abdomen in pregnancy is a unique clinical challenge. We report a rare case of hydrosalpinx presenting as acute abdomen in the third trimester of pregnancy in the absence of infection and hormonal treatment. Case A 38-year-old Caucasian woman (gravida 4, para 3), at an estimated 29 weeks of a spontaneous singleton pregnancy, presented to the emergency department with severe abdominal pain in the right lower quadrant, which had been present for three days. Magnetic resonance imaging (MRI) demonstrated a right-sided hydrosalpinx. It was successfully treated with conservative treatment and the patient delivered vaginally at term without complication. Conclusion Hydrosalpinx should be considered as one of the differential diagnoses for acute abdomen during pregnancy. A multidisciplinary approach is recommended, with a careful work-up, due to the risks to both fetus and mother.