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Introduction Histogenesis Stromal and sex cord–stromal tumors of the ovary constitute a diverse collection that is derived from the ovarian cortical stromal and hilar cells ( Fig. 27.1 ). These cells form during embryogenesis as condensations of subcoelomic mesenchyme, in…

Germ cell tumors of the ovary are presumed to derive from the pathogenic transformation of ovarian germ cells at different stages of development. The tumors that develop from these transformed germ cells are among the most unique in the human…