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Long-term results of suppressing thyroid-stimulating hormone during radiotherapy to prevent primary hypothyroidism in medulloblastoma/PNET and Hodgkin lymphoma:a prospective cohort study

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Frontiers of Medicine 2021年第1期15卷 101-107页

作者： Maura Massimino marta podda Lorenza Gandola Emanuele Pignoli Ettore Seregni Carlo Morosi Filippo Spreafico Andrea Ferrari Emilia Pecori Monica Terenziani Pediatric Oncology Unit Fondazione IRCCS Istituto Nazionale dei TumoriMilan 20146Italy Pediatric Radiotherapy Unit Fondazione IRCCS Istituto Nazionale dei TumoriMilan 20146Italy Medical Physics Unit Fondazione IRCCS Istituto Nazionale dei TumoriMilan 20146Italy Department of Nuclear Medicine Fondazione IRCCS Istituto Nazionale dei TumoriMilan 20146Italy Department of Radiology Fondazione IRCCS Istituto Nazionale dei TumoriMilan 20146Italy

Primary hypothyroidism commonly occurs after radiotherapy(RT),and coincides with increased circulating thyroid-stimulating hormone(TSH)*** tested therefore the protective effect of suppressing TSH with L-thyroxine during RT for medulloblastoma/PNET and Hodgkin lymphoma(HL)in a prospective cohort *** 1998 to 2001,a total of 37 euthyroid children with medulloblastoma/PNET plus 14 with HL,scheduled for craniospinal irradiation and mediastinum/neck radiotherapy,respectively,underwent thyroid ultrasound and free triiodothyronine(FT3),free thyroxine(FT4),and TSH evaluation at the beginning and end of craniospinal *** 14 days before and up to the end of radiotherapy,patients were administered L-thyroxine checking every 3 days TSH to ensure a value<0.3μIU/*** follow-up,blood tests and ultrasound were repeated;primary hypothyroidism was considered an increased TSH level greater than normal ***-two/37 patients with medulloblastoma/PNET and all the 14 patients with HL were alive after a median 231 months from radiotherapy with 7/22 and 8/14 having correctly reached TSH levels˂0.3μIU/mL and well matched for other *** years on,hypothyroidism-free survival rates differed significantly,being 60%±15%and 15.6%±8.2%in TSH-suppressed ***-TSH suppressed patients,respectively(P=0.001).These findings suggest that hypothyroidism could be durably prevented in two populations at risk of late RT sequelae,but it should be confirmed in a larger cohort.

关键词： iatrogenic primary hypothyroidism late effects of radiotherapy long-term follow-up medulloblastoma Hodgkin lymphoma

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