Left ovary is not separately visualized. A large pelviabdominal multiseptated cyst is replacing the left ovary, occupying much of the abdomen and displacing abdominal viscera. It is not infiltrating adjacent organs. It has a smooth, thin wall. The internal septae are fine and there are no mural nodules. The post contrast study reveals mild enhancement of the smooth walls. No internal cyst enhancement. Normal uterus and right ovary. No pelvic lymphadenopathy. No ascites. No other focal abnormality.