{"paper_id":"4f3ff57b-b8f9-4476-bd4d-bd68a0d3d131","body_text":"Abstract\nIntroduction\nIt is suspected that uterine malformations and endometriosis have a high coincidence. Furthermore, it is expected that obstructive uterine malformations are significantly higher affected than non-obstructive malformations. The correlation between endometriosis and uterine malformations may be due to increased retrograde menstruation, which would explain a higher coincidence of obstructive malformations and endometriosis [14].\nMethods\nThis retrospective study investigates whether patients with uterine malformations have a higher prevalence of endometriosis. The study includes patients with uterine malformations who were admitted to our hospital in the period from 01.12.2014 to 30.11.2019.\nResults\n279 cases were analysed. 263 (94.2%) patients had a non-obstructive uterine malformation, 12 (4.3%) patients had an obstructive uterine malformation and 4 (1.4%) patients had uterine agenesia/hypoplasia. 209 (74.9%) patients had histologically confirmed endometriosis (peritoneal, ovarian or deep infiltrating) and 70 (25.1%) had no endometriosis. In 27 cases, deep infiltrating endometriosis (ENZIAN ABC) was detected additionally to peritoneal and ovarian endometriosis.\nConclusion\nThe study shows a high prevalence of endometriosis in women with uterine malformations. For this reason, endometriosis should always be specifically sought in uterine malformations.\nSimilar content being viewed by others\nReferences\nAcien P (1986) Endometriosis and genital anomalies: some histogenetic aspects of external endometriosis. 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Gynecol Obstet Investig 40:261–264\nAuthor information\nAuthors and Affiliations\nContributions\nEP: manuscript writing, data management, data analysis. TR: project development and administration.\nCorresponding author\nEthics declarations\nConflict of interest\nThe authors declare that they have no conflict of interest.\nEthical approval\nThis study was carried out in consensus with our university´s ethics guidelines. After an oral request to our responsible ethics committee, special approval for a retrospective analysis without the use of individual patient data (as in this publication) is not required.\nIRB approval\nThis study was carried out in consensus with our university´s ethics guidelines.\nAdditional information\nPublisher's Note\nSpringer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.\nRights and permissions\nAbout this article\nCite this article\nPiriyev, E., Römer, T. Coincidence of uterine malformations and endometriosis: a clinically relevant problem?. Arch Gynecol Obstet 302, 1237–1241 (2020). https://doi.org/10.1007/s00404-020-05750-9\nReceived:\nAccepted:\nPublished:\nVersion of record:\nIssue date:\nDOI: https://doi.org/10.1007/s00404-020-05750-9","source_license":"public-domain-us","license_restricted":false}