Adnexal Mass in Pregnancy

Adnexal masses are defined as any tumor that originates in the ovary, fallopian tube or surrounding tissue. Due to the systematic use of prenatal ultrasonography and the introduction of the first trimester ultrasound screening, there is an increase in the detection of asymptomatic adnexal massed in pregnancy. In a minority of cases, the following complications can occur: discomfort, pain, ovarian torsion, larger than expected uterus, dystocia. We report the case of a 19-year-old pregnant woman, gravida 3 para 3, who came to the emergency room for lower abdominal pain radiating to the left flank. She had 2 previous cesarean sections. During the cesarean section, after the delivery of a healthy 3500g boy, a 20/15 left ovarian cystic tumor was discovered. Left adnexectomy was performed and the pathology result was ovarian mucinous cystadenoma. Although the discovery of adnexal mass at the time of cesarean delivery is not uncommon, being estimated to occur between 1 in 200 and 1 in 450 cases, the discovery of such a large asymptomatic cyst is extremely rare. Usually cyst beyond 6-10 cm have a high risk for torsion, rupture or malignancy.