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Ovarian proliferative lesions in mice. (A) Normal ovary showing germ cell, stromal, and epithelial elements. (B) Cyst with epithelial hyperplasia. (C) Cystadenoma with adjacent epithelial proliferation. (D) Cystadenocarcinoma. (E) Cystadenoma. (F) Granulosa cell tumor. (G) Sertoli cell tumor. (H) Tubulostromal cell tumor. (I) Bi-ovulate follicle from a RasH2 mouse. H&E.
