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Ovarian germ cell tumors represent 15 to 20 % of all ovarian tumors .They are rapidly growing neoplasm that arise from primordial germ cells derived from the embryo gonad .Approximately 95% of germ cell tumors are represented by benign cystic teratomas and are relatively easy to diagnose .The remaining 5% are malignant germ cell tumors and responsible for most of the diagnostic difficulties. ................
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