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This study aimed to investigate the association between chemotherapy and the risk of developing BCRL in patients with new-onset breast cancer.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Methods<\/jats:title>\n            <jats:p>This nationwide retrospective cohort study utilized data from the Korean National Health Insurance database and the Korea National Cancer Incidence Database (2006\u20132017). Using 1:1 propensity score matching, 37,202 participants who received chemotherapy and 37,202 who did not receive chemotherapy were included in the analysis. Cox proportional hazard regression models were employed to examine the association between chemotherapy and the risk of developing BCRL.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Results<\/jats:title>\n            <jats:p>Among the 74,404 participants, 11,508 (15.5%) were diagnosed with BCRL during the follow-up period. Compared with patients who did not receive chemotherapy, the risk of BCRL was higher in patients undergoing chemotherapy (hazard ratio [95% confidence interval]: 1.95 [1.87\u20132.04]). Furthermore, compared to patients who did not receive chemotherapy, the risk of BCRL was confirmed in the taxane (3.38 [3.19\u20133.58]), antimetabolite (1.79 [1.67\u20131.91]), and anthracycline (1.49 [1.41\u20131.56]) chemotherapy groups.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Conclusion<\/jats:title>\n            <jats:p>Chemotherapy administration following a diagnosis of breast cancer increases the risk of BCRL. Therefore, vigilant monitoring for BCRL, particularly in patients undergoing chemotherapy with taxanes, antimetabolites, or anthracyclines, is warranted during follow-up.<\/jats:p>\n          <\/jats:sec>","DOI":"10.1007\/s00520-025-09169-3","type":"journal-article","created":{"date-parts":[[2025,2,3]],"date-time":"2025-02-03T07:38:53Z","timestamp":1738568333000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Association between chemotherapy and the risk of developing breast cancer-related lymphedema: a nationwide retrospective cohort study"],"prefix":"10.1007","volume":"33","author":[{"given":"Sung Hoon","family":"Jeong","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Seong Min","family":"Chun","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hyunji","family":"Lee","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Miji","family":"Kim","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mira","family":"Choi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0465-6392","authenticated-orcid":false,"given":"Ja-Ho","family":"Leigh","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2025,2,3]]},"reference":[{"key":"9169_CR1","doi-asserted-by":"publisher","first-page":"170","DOI":"10.1097\/SLA.0000000000003491","volume":"274","author":"HK Byun","year":"2021","unstructured":"Byun HK, Chang JS, Im SH, Kirova YM, Arsene-Henry A, Choi SH, Cho YU, Park HS, Kim JY, Suh C-O (2021) Risk of lymphedema following contemporary treatment for breast cancer: an analysis of 7617 consecutive patients from a multidisciplinary perspective. 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