{"paper_id":"f43eb920-2c96-4c0a-a806-d0f30c97d79e","body_text":"Abstract\nOvarian endometriomas are found in a consistent proportion of patients with endometriosis and are associated with a more severe form of the disease. The endometriotic tissue lining the inside of the endometrioma has been extensively studied over the years mostly for the need to compare the molecular and cellular characteristics of eutopic and ectopic endometria. Several aspects of hormonal regulation, response to local inflammation, carcinogenesis, and modifications of the local environment have been investigated in order to characterize also the processes associated with peritoneal endometriosis. In this review, we have summarized the current knowledge of pathophysiology of endometrioma, with a particular focus on the cellular components lining the internal surface of the cyst in order to provide a comprehensive overview of the hormonal, genetic, epigenetic, and gene expression profiles of this essential part of the cyst.\nSimilar content being viewed by others\nReferences\nBusacca M, Vignali M. Endometrioma excision and ovarian reserve: a dangerous relation. J Minim Invasive Gyneol. 2009;16(2):142–148.\nVigano P, Vanni VS, Corti L, et al. Unravelling the ovarian endometrioma pathogenesis: “the long and winding road” across the various theories. J Endometriosis. 2013;5(2):62–67.\nNisolle M, Donnez J. Peritoneal endometriosis, ovarian endometriosis, and adenomyotic nodules of the rectovaginal septum are three different entities. Fertil Steril. 1997;68(4):585–596.\nVercellini P, Crosignani P, Somigliana E, et al. 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Eur J Obstet Gynecol Reprod Biol. 2004;113(1):87–93.\nAuthor information\nAuthors and Affiliations\nCorresponding author\nRights and permissions\nAbout this article\nCite this article\nSanchez, A.M., Viganò, P., Somigliana, E. et al. The Endometriotic Tissue Lining the Internal Surface of Endometrioma: Hormonal, Genetic, Epigenetic Status, and Gene Expression Profile. Reprod. Sci. 22, 391–401 (2015). https://doi.org/10.1177/1933719114529374\nPublished:\nIssue date:\nDOI: https://doi.org/10.1177/1933719114529374","source_license":"CC0","license_restricted":false}