Definition

A term that describes certain types of ovarian cancers that form in the tissue covering the ovary. The main types of non-serous epithelial ovarian cancer are clear cell carcinoma, endometroid carcinoma, and mucinous carcinoma. Each type differs as to how the cancer cells look under a microscope, the tumor markers present, how quickly the cancer cells are likely to grow and spread, and their likely response to treatment. Non-serous epithelial ovarian cancers are much less common than serous epithelial ovarian cancer.