{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,15]],"date-time":"2026-07-15T14:11:03Z","timestamp":1784124663574,"version":"3.55.0"},"reference-count":5,"publisher":"Bioscientifica","issue":"4","license":[{"start":{"date-parts":[[2026,7,2]],"date-time":"2026-07-02T00:00:00Z","timestamp":1782950400000},"content-version":"vor","delay-in-days":8,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":["journals.bioscientifica.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2026,8,1]]},"abstract":"<jats:sec>\n                    <jats:title>Abstract<\/jats:title>\n                    <jats:p>Guidelines recommend stopping breastfeeding before radioactive iodine (131I) therapy, yet the optimal timing for safe resumption remains unclear. We report a detailed dosimetric case study of a 29-year-old woman treated with 3,700 MBq 131I for papillary thyroid carcinoma who wished to resume breastfeeding. Weekly breast milk samples were analyzed using calibrated gamma counting until radioactivity fell below a conservative safety threshold. Results showed substantial iodine excretion in milk (\u223c15% of administered activity) with biphasic clearance. Estimated infant radiation exposure varied dramatically depending on resumption timing, ranging from 0.62 to 688 mSv. A strict activity-based threshold suggested delaying breastfeeding for 51 days, whereas a dosimetric approach limiting infant exposure to 1 mSv supported resumption as early as 9\u201310 days post-therapy. These findings highlight the limitations of fixed recommendations and support an individualized, measurement-based strategy to optimize mother and child safety.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1530\/etj-26-0012","type":"journal-article","created":{"date-parts":[[2026,6,24]],"date-time":"2026-06-24T16:11:27Z","timestamp":1782317487000},"update-policy":"https:\/\/doi.org\/10.1530\/crossmarkpolicy-17","source":"Crossref","is-referenced-by-count":0,"title":["Estimation of the delay for resumption of breastfeeding after 131-iodine therapy by milk radioactivity measurement"],"prefix":"10.1530","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5874-6858","authenticated-orcid":true,"given":"Sarah","family":"Chaib","sequence":"first","affiliation":[{"name":"Hospices Civils de Lyon 1 , ,","place":["Lyon, France"]},{"name":"Department of Biophysics, Institute of Pharmaceutical and Biological Sciences, Claude Bernard University Lyon 1 2 , ,","place":["Lyon, France"]},{"name":"Lyon Cancer Research Center, CNRS, INSERM 3 , ,","place":["Lyon, France"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sol\u00e8ne","family":"Castellnou","sequence":"additional","affiliation":[{"name":"Hospices Civils de Lyon 1 , ,","place":["Lyon, France"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tassadit","family":"Keniza","sequence":"additional","affiliation":[{"name":"Hospices Civils de Lyon 1 , ,","place":["Lyon, France"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Emeline","family":"Daru","sequence":"additional","affiliation":[{"name":"Hospices Civils de Lyon 1 , ,","place":["Lyon, France"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anthony","family":"Triplet","sequence":"additional","affiliation":[{"name":"Hospices Civils de Lyon 1 , ,","place":["Lyon, France"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Juliette","family":"Abeillon","sequence":"additional","affiliation":[{"name":"Hospices Civils de Lyon 1 , ,","place":["Lyon, France"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8974-6930","authenticated-orcid":true,"given":"Perrine","family":"Tylski","sequence":"additional","affiliation":[{"name":"Hospices Civils de Lyon 1 , ,","place":["Lyon, France"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"416","published-online":{"date-parts":[[2026,6,24]]},"reference":[{"key":"2026071509313329900_bib1","doi-asserted-by":"crossref","first-page":"1856","DOI":"10.1093\/annonc\/mdz400","article-title":"Thyroid cancer: ESMO clinical practice guidelines for diagnosis, treatment and follow-up","volume":"30","author":"Filetti","year":"2019","journal-title":"Ann Oncol"},{"key":"2026071509313329900_bib2","first-page":"1","article-title":"1990 Recommendations of the International Commission on Radiological Protection","volume":"21","year":"1991","journal-title":"Ann ICRP"},{"key":"2026071509313329900_bib3","first-page":"1797","article-title":"Iodine-131 in breast milk following therapy for thyroid carcinoma","volume":"35","author":"Robinson","year":"1994","journal-title":"J Nucl Med"},{"key":"2026071509313329900_bib4","doi-asserted-by":"crossref","first-page":"347S","DOI":"10.1093\/advances\/nmy020","article-title":"Iodine in human milk: a systematic review","volume":"9","author":"Dror","year":"2018","journal-title":"Adv Nutr"},{"key":"2026071509313329900_bib5","doi-asserted-by":"crossref","first-page":"3442","DOI":"10.1016\/j.radcr.2021.08.035","article-title":"A case of the accumulation of 131-iodine in the mammary gland after remnant ablation for papillary thyroid carcinoma on lactating period","volume":"16","author":"Murayama","year":"2021","journal-title":"Radiol Case Reports"}],"container-title":["European Thyroid 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