TSH Suppression During Radiotherapy on Thyroid Site to Prevent Iatrogenic Hypothyroidism in Pediatric Cancer Patients

Официальное название

Protection From Iatrogenic Hypothyroidism Patients With MBL and Pediatric Patients With HL and Non-HL Needing Radiotherapy on Thyroid Site

Обзор

To offer the possibility of a treatment that could achieve a meaningful reduction in the incidence of post-radiation therapy hypothyroidism. Thyroid dysfunction may develop from a few months to several years after patients have completed their radiation treatment. In children with chronic diseases, or given lengthy anti-neoplastic treatments, recurrent or persistent endocrine disorders may have a negative effect on growth and development into adulthood.

Подробное описание

Patients will undergo basal thyroid ultrasound and FT3, FT4, TSH assay. Simulations with computed tomography, and computer assisted three-dimensional treatment planning with a dose volume histogram will be used to identify thyroid volumes and corresponding RT isodose distributions.

The enrolled patients will be randomly assigned (1:1) to TSH suppression group (experimental group) or non-TSH suppression group (control group). Random allocation will be managed centrally by Clinical epidemiology and Trial organization of the Fondazione IRCCS Istituto Nazionale dei Tumori. The randomization list will be generated by SAS software. Investigators and patients will not be masked to treatment allocation.

From 14 days beforehand and throughout their RT, patients in the experimental arm will receive L-thyroxine in the morning on an empty stomach (half an hour before breakfast), starting with 1-2 μg/kg, and adjusting the dose every 3 days to ensure TSH \< 0.3 μIU/mL before RT beginning. The 0.3 μIU/mL threshold is just below normal range not causing hyperthyroidism, and is defined as "mild" TSH suppression. Based on hormone status, L-thyroxine doses will be gradually increased to patients' individual minimum TSH-suppressive dose before starting RT, maintained throughout the treatment, then rapidly tapered off (half dose the next day after RT, 25% the following day and stop).

Вмешательства

• Препарат Levothyroxine
  Levothyroxine is used to treat hypothyroidism (low thyroid function). This medicine is given when your thyroid does not produce enough of this hormone on its own.

Первичные конечные точки

• Hypothyroidism-free survival [Срок оценки: 3 years]

Критерии участия

Критерии включения

• Any patient with medulloblastoma, Hodgkin/non-Hodgkin Lymphoma before radiotherapy (RT) planning including thyroid parenchyma without previous primary or secondary hypothyroidism;
• Written informed consent prior to any study-specific analysis and/or data collection.

Критерии исключения

• Any patient with medulloblastoma, Hodgkin/non-Hodgkin Lymphoma after radiotherapy including thyroid parenchyma;
• Not signed consent.

Критерии приведены из реестра в оригинале (на английском). Окончательную оценку соответствия проводит исследовательский центр.

Здоровые добровольцы: Нет

Дизайн исследования

Распределение

Рандомизированное

Модель

Параллельные группы

Маскирование

Открытое

Основная цель

Профилактика

Центры проведения

Италия · 1 центр

• Fondazione IRCCS Istituto Nazionale dei Tumori — Milan

Публикации

• Prpic M, Kruljac I, Kust D, Suton P, Purgar N, Bilos LK, Gregov M, Mrcela I, Franceschi M, Djakovic N, Frobe A. Dose-volume derived nomogram as a reliable predictor of radiotherapy-induced hypothyroidism in head and neck cancer patients. Radiol Oncol. 2019 Nov 20;53(4):488-496. doi: 10.2478/raon-2019-0055. PMID 31747379
• Alba JR, Basterra J, Ferrer JC, Santonja F, Zapater E. Hypothyroidism in patients treated with radiotherapy for head and neck carcinoma: standardised long-term follow-up study. J Laryngol Otol. 2016 May;130(5):478-81. doi: 10.1017/S0022215116000967. Epub 2016 Mar 15. PMID 26975210
• Massimino M, Gandola L, Collini P, Seregni E, Marchiano A, Serra A, Pignoli E, Spreafico F, Pallotti F, Terenziani M, Biassoni V, Bombardieri E, Fossati-Bellani F. Thyroid-stimulating hormone suppression for protection against hypothyroidism due to craniospinal irradiation for childhood medulloblastoma/primitive neuroectodermal tumor. Int J Radiat Oncol Biol Phys. 2007 Oct 1;69(2):404-10. doi: 10. PMID 17601681
• Massimino M, Gandola L, Pignoli E, Seregni E, Marchiano A, Pecori E, Catania S, Cefalo G. TSH suppression as a possible means of protection against hypothyroidism after irradiation for childhood Hodgkins lymphoma. Pediatr Blood Cancer. 2011 Jul 15;57(1):166-8. doi: 10.1002/pbc.22915. Epub 2011 Feb 9. PMID 21557462
• Massimino M, Podda M, Gandola L, Pignoli E, Seregni E, Morosi C, Spreafico F, Ferrari A, Pecori E, Terenziani M. Long-term results of suppressing thyroid-stimulating hormone during radiotherapy to prevent primary hypothyroidism in medulloblastoma/PNET and Hodgkin lymphoma: a prospective cohort study. Front Med. 2021 Feb;15(1):101-107. doi: 10.1007/s11684-020-0752-2. Epub 2020 Aug 13. PMID 32794013
• Groover TA, Christie AC, Merritt EA, Coe FO, McPeak EM. Roentgen irradiation in the treatment of hyperthyroidism: a statistical evaluation based on three hundred and five cases. JAMA 1929; 92:1730-1734.
• Bantle JP, Lee CK, Levitt SH. Thyroxine administration during radiation therapy to the neck does not prevent subsequent thyroid dysfunction. Int J Radiat Oncol Biol Phys. 1985 Nov;11(11):1999-2002. doi: 10.1016/0360-3016(85)90283-4. PMID 3932271

Идентификаторы

NCT: NCT05316922 · INT122/21

Первоисточники (государственные реестры)

• ClinicalTrials.gov (NIH, США)

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