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Ovarian tumors are categorized based on their most likely tissue of origin: surface epithelium, the thin outer layer of the ovary; sex cord–stromal, the tissue that contains hormone-producing cells; and germ cell, which is the egg-producing region of the ovary. Reproduced with permission from “Ovarian Cancer: A Review of Current Serum Markers and Their Clinical Applications” by Dr Alicia Algeciras-Schimnich in the March 2013 issue of Clinical Laboratory News.
