Giant ovarian cyst in pregnancy: a rare clinical encounter and its implications: a case report.

Giant ovarian cyst is a rare condition with <1% of ovarian cysts. A giant ovarian cyst may interfere with pregnancy and could induce some obstetrics complications and surgery challenges. This case presents a 26-year-old woman with 34 weeks of gestational age came to the polyclinic with right abdominal discomfort. Ultrasound examination showed a singleton live fetal breech presentation with the biometry of 34 weeks and a unilocular mucinous cystic mass arise from the left adnexa with low CA-125 levels. On 38 weeks of gestational age, a Cesarean section was done and evacuated a 35 cm, unilocular cyst that contained 11 L of yellowish fluid. Histopathological examination confirm the benign origin of the mass. Ultrasound examination is essential to determine the cyst characteristic and nature. When detected early in the second trimester, evacuation of the mass could have been done to prevent complications and optimizing the outcome.