What are mucinous ovarian tumors?

➢ Mucinous tumors differ from serous tumors in two respects: The neoplastic epithelium consists of mucin-secreting cells; Mucinous tumors are considerably less likely to be malignant. ➢ Overall, only 10% of mucinous tumors are malignant; another 10% are borderline, and 80% are benign. ➢ The prognosis of mucinous cystadenocarcinoma is somewhat better than that of its serous counterpart ➢ Although stage rather than histologic type (serous versus mucinous) is the major determinant of outcome. ➢ Mutations in KRAS are detected in approximately 50% of ovarian mucinous carcinomas,