Forty-nine cases of ovarian endometrioid carcinoma with squamous foci were reviewed. Of particular interest was the biologic behavior of the neoplasms in relation to the appearance of the epithelium. As previously noted for the analogous uterine endometrial tumors, the ovarian adenosquamous lesions occurred later in life, were more advanced, were associated with less differentiated adenocarcinomatous components, and had a poorer prognosis. The five-year survival rate for patients with adenosquamous endometrioid ovarian carcinoma was 21% in comparison with the 90% survival found in patients with ovarian endometrioid adenocanthoma.
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