- Patients with the following histologic epithelial cell types are eligible: serous adenocarcinoma, endometrioid adenocarcinoma, mucinous adenocarcinoma, undifferentiated carcinoma, clear cell adenocarcinoma, mixed epithelial carcinoma, transitional cell carcinoma, malignant Brenner's Tumor, or adenocarcinoma not otherwise specified (N.O.S.); however, the histologic features of the tumor must be compatible with a primary Müllerian epithelial adenocarcinoma; if doubt exists, it is recommended that the investigator should have the slides reviewed by an independent pathologist prior to entry; patients may have co-existing endometrial cancer so long as the primary origin of invasive tumor is ovarian or peritoneal; Note: patients with mucinous, low grade and clear cell disease are eligible unless there is a higher priority GOG trial open (11/02/2009) (08/16/2010)