A multilocular tumor with mucin secreting epithelium. They are most often found in the ovary, but are also found in the pancreas, appendix, and rarely, retroperitoneal and in the urinary bladder. They are considered to have low-grade malignant potential.

Synonyms: Cystadenomas, Mucinous, Mucinous Cystadenoma, Cystadenoma, Mucinous, Mucinous Cystadenomas