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Objective: Our purpose was to evaluate the prognostic factors in yolk sac tumors of the ovary. Study Design: We performed a retrospective review of 47 patients with yolk sac tumors of the ovary from 1979 to 1997. Results: Twenty-two patients had pure yolk sac tumors and 25 had germ cell tumors with yolk sac tissue as a component of the disease. The 5-year survival rate in stages I, II, III, and IV...