Storey, D J and Rush, Robert and Stewart, Moira and Rye , Tzyvia and Al-Nafussi, Awatif and Williams, Alistair R and Smyth, John F and Gabra, Hani (2008) Endometrioid epithelial ovarian cancer: 20 Years of prospectively collected data from a single center. Cancer, 112 (10). pp. 2211-2220. ISSN 0008543X
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Official URL: http://dx.doi.org/10.1002/cncr.23438
BACKGROUND. Clinicopathological features and outcome of women with endo-metrioid and serous ovarian adenocarcinoma were compared. METHODS. Between 1984 and 2004, baseline and follow-up data were prospectively recorded on 1545 patients with ovarian cancer. Of these, 270 had pure endometrioid tumors; 659 had pure serous adenocarcinoma of the ovary. Response to platinum-based chemotherapy (PBC) overall survival, stage-for-stage median progression-free survival (PFS), and cause-specific median survival were compared. Independent predictors of survival were examined by using multivariate analyses. RESULTS. Median age of diagnosis for patients with endometrioid tumors was younger than those with serous adenocarcinoma of the ovary (60 years vs 62 years; P =.013). They presented more often with early disease (stage I and 11; 50% vs 17%; P <.001), had less ascites, and had better performance status both overall and for stage II and III disease. More endometrioid tumors were optimally debulked overall (71% vs 45%; P <.001), but there was no difference according to stage. Objective and CA125 PBC response rates were not significantly different, but median PFS was better for patients with endometrioid tumors (24 months vs 13 months; P <.0001) as was overall median survival (48 months vs 22 months; P <.0001). This relation remained for stage II and III disease and for moderately and poorly differentiated tumors. Patients with concurrent endometrioid ovarian and endometrial malignancies had a survival advantage compared with those with ovarian malignancies alone. Independent predictors of survival after PBC were histological type, debulking status, and disease stage. CONCLUSIONS. Despite similar PBC response rates, endometrioid histology is associated with better survival compared with serous adenocarcinoma of the ovary, even with stage III or poorly differentiated tumors.
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