{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,19]],"date-time":"2026-08-19T13:24:03Z","timestamp":1787145843003,"version":"build-2736575974"},"reference-count":66,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2026,8,19]],"date-time":"2026-08-19T00:00:00Z","timestamp":1787097600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Cardiovasc. Med."],"abstract":"<jats:p>Differentiated thyroid cancer (DTC) is associated with favorable long-term survival in most patients, shifting clinical priorities from recurrence prevention alone toward survivorship care and competing cardiovascular risk. Thyroid-stimulating hormone (TSH) suppression with levothyroxine remains biologically plausible and clinically important in selected patients with high-risk disease, biochemical incomplete response, or persistent structural disease. However, prolonged exogenous subclinical hyperthyroidism may increase heart rate, atrial arrhythmogenicity, myocardial workload, vascular stress, and cardiovascular vulnerability. This issue is particularly relevant in metabolically unhealthy survivors, including those with obesity, insulin resistance, diabetes, hypertension, dyslipidemia, metabolic syndrome, chronic kidney disease, or established atherosclerotic cardiovascular disease. In these patients, TSH suppression may interact with a pre-existing pro-arrhythmic, pro-inflammatory, and pro-atherogenic substrate, although direct evidence that metabolic phenotype modifies suppression-related cardiovascular risk is currently lacking. This narrative review examines the evolving benefit-harm balance of long-term TSH suppression in DTC survivorship from a cardiovascular perspective. We discuss the oncologic rationale and uncertainty of persistent suppression, cardiovascular liabilities of chronic low TSH exposure, the potential role of cardiometabolic dysfunction as a modifier of treatment tolerance, treatment-related modifiers including radioiodine preparation and multikinase inhibitors, and a hypothesis-generating metabolism-informed framework for TSH target selection. The proposed framework integrates recurrence risk, dynamic response to therapy, cardiometabolic phenotype, cumulative suppression exposure, and cardiovascular reserve, but should be regarded as a hypothesis-generating model that requires prospective validation before it can guide TSH targets.<\/jats:p>","DOI":"10.3389\/fcvm.2026.1924477","type":"journal-article","created":{"date-parts":[[2026,8,19]],"date-time":"2026-08-19T12:27:47Z","timestamp":1787142467000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["Long-term TSH suppression in metabolically unhealthy survivors of differentiated thyroid cancer: a cardiovascular perspective"],"prefix":"10.3389","volume":"13","author":[{"given":"Jiangtao","family":"Chai","sequence":"first","affiliation":[{"name":"Department of Endocrinology, 960 Hospital of People\u2019s Liberation Army","place":["Jinan, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaoting","family":"Cai","sequence":"additional","affiliation":[{"name":"Department of Endocrinology, 960 Hospital of People\u2019s Liberation Army","place":["Jinan, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yanan","family":"Zhang","sequence":"additional","affiliation":[{"name":"Department of Endocrinology, 960 Hospital of People\u2019s Liberation Army","place":["Jinan, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qidong","family":"Tan","sequence":"additional","affiliation":[{"name":"Department of Endocrinology, 960 Hospital of People\u2019s Liberation Army","place":["Jinan, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wei","family":"Qu","sequence":"additional","affiliation":[{"name":"Department of Endocrinology, 960 Hospital of People\u2019s Liberation Army","place":["Jinan, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ying","family":"Qian","sequence":"additional","affiliation":[{"name":"Department of Endocrinology, 960 Hospital of People\u2019s Liberation Army","place":["Jinan, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1965","published-online":{"date-parts":[[2026,8,19]]},"reference":[{"key":"B1","doi-asserted-by":"publisher","first-page":"841","DOI":"10.1177\/10507256251363120","article-title":"2025 American thyroid association management guidelines for adult patients with differentiated thyroid cancer","volume":"35","author":"Ringel","year":"2025","journal-title":"Thyroid"},{"key":"B2","doi-asserted-by":"publisher","first-page":"1","DOI":"10.1089\/thy.2015.0020","article-title":"). 2015 American thyroid association management guidelines for adult patients with thyroid nodules and differentiated thyroid cancer: the American thyroid association guidelines task force on thyroid nodules and differentiated thyroid cancer","volume":"26","author":"Haugen","year":"2016","journal-title":"Thyroid"},{"key":"B3","doi-asserted-by":"publisher","first-page":"135","DOI":"10.1089\/thy.2009.0311","article-title":"Benefits of thyrotropin suppression versus the risks of adverse effects in differentiated thyroid cancer","volume":"20","author":"Biondi","year":"2010","journal-title":"Thyroid"},{"key":"B4","doi-asserted-by":"publisher","first-page":"674","DOI":"10.1089\/thy.2023.0711","article-title":"The effect of thyrotropin suppression on survival outcomes in patients with differentiated thyroid cancer: a systematic review and meta-analysis","volume":"34","author":"Gubbi","year":"2024","journal-title":"Thyroid"},{"key":"B5","doi-asserted-by":"publisher","first-page":"671","DOI":"10.1089\/thy.2024.0232","article-title":"TSH Suppression in differentiated thyroid cancer patients. 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