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We report a population-based histopathologic review of primary ovarian neoplasms. No significant changes in incidence were encountered between the 1969 and 1979 review periods. The most frequent single tumor was benign cystic teratoma (26.5%), while the coelomic-derived "epithelial" tumors constituted the most frequent group (57.6% of all tumors and 93.8%(More)