NCIt definition : An invasive malignant neoplasm that arises from the ovary and is characterized by
the presence of malignant epithelial cells that, in well differentiated tumors, resemble
the epithelium of the fallopian tube or, in poorly differentiated tumors, show anaplastic
features and marked nuclear atypia. It includes serous adenocarcinoma and serous adenocarcinofibroma.;