{"paper_id":"9cabf15d-480c-45dd-8973-bcba27255d25","body_text":"Abstract\nThe clinical entity in which functional endometrial tissue is present in the thoracic cavity causing various clinical manifestations is called thoracic endometriosis syndrome (TES). Catamenial hemothorax (CHt) is a clinical manifestation of TES characterized by recurrent hemothorax which occurs during each menstrual cycle. The establishment of a correlation between menstrual cycle and clinical features is necessary for the diagnosis. We report a case of CHt in a 36-year-old female who presented with recurrent right-side pleural effusion.\nSimilar content being viewed by others\nData availability\nData regarding study is available with the corresponding author. Data will be provided at request.\nReferences\nChetambath R, Kumar P, Nandini V, Chandran S, Chacko A. Catamenial haemothorax—a rare cause of pleural effusion. Lung India. 2023;40:541–4.\nNezhat C, Lindheim SR, Backhus L, Vu M, Vang N, Nezhat A, et al. Thoracic endometriosis syndrome: a review of diagnosis and management. JSLS: J Soc Laparoendosc Surg. 2019;23:e2019.00029.\nAdesanya OA, Kolawole OE. Thoracic endometriosis syndrome: cutting the gordian knot–a case report and review of the literature. Int J Surg Case Rep. 2020;1:68–71.\nFukuda S, Hirata T, Neriishi K, Nakazawa A, Takamura M, Izumi G, et al. Thoracic endometriosis syndrome: comparison between catamenial pneumothorax or endometriosis-related pneumothorax and catamenial hemoptysis. Eur J Obstet Gynecol Reprod Biol. 2018;1:118–23.\nAhmed A, Garba I, Denue BA, Alkali MB, Bakki B, Rawizza H. Catamenial right haemothorax due to endometriosis: two case reports. Afr J Respir Med. 2015;10:24–26.\nVelagapudi RK, Egan JP. Thoracic endometriosis: a clinical review and update of current and evolving diagnostic and therapeutic techniques. Curr Pulmonol Rep. 2021;10:22–9.\nAzizad-Pinto P, Clarke D. Thoracic endometriosis syndrome: case report and review of the literature. Permanente J. 2014;18:61.\nFunding\nNone.\nAuthor information\nAuthors and Affiliations\nCorresponding author\nEthics declarations\nEthics approval\nThis case report does not require ethical approval. Consent was taken from the patient for publishing data.\nAnimal rights statement\nNot applicable.\nHuman rights statement\nThe authors assert that all procedures contributing to this study comply with the ethical standards of the relevant national guidelines and with the Declaration of Helsinki 1975, as revised in 2008.\nConflict of interest\nThe authors have not received any funding or benefits from industry or elsewhere to conduct this study.\nAdditional information\nPublisher's Note\nSpringer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.\nRights and permissions\nSpringer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.\nAbout this article\nCite this article\nYoganadhan, P.P., Radhakrishnan, R., Babu, A. et al. Catamenial hemothorax: a perplexing tale of unilateral hemothorax. Indian J Thorac Cardiovasc Surg 41, 318–320 (2025). https://doi.org/10.1007/s12055-024-01791-w\nReceived:\nRevised:\nAccepted:\nPublished:\nVersion of record:\nIssue date:\nDOI: https://doi.org/10.1007/s12055-024-01791-w","source_license":"CC0","license_restricted":false}