Ovarian epithelial tumors can be benign, LMP, and malignant. The prognoses of these three types of tumors are entirely different. A frozen section has to be done on all ovarian tumors to determine if they are benign. All lesions that are LMP or malignant have to be surgically and pathologically staged. The stage of disease is the most important prognostic factor. Other prognostic indicators vary with the type of epithelial tumor and are discussed in the text.