Abstract:
BACKGROUND:Thyroid dysfunction has been reported in up to 52% of patients 1.4 years after treatment with (131) I-Metaiodobenzylguanidine (MIBG) in children with neuroblastoma (NBL), despite the use of potassium-iodide (KI). Our aim was to investigate if the incidence and severity of thyroid damage increases in time. MATERIALS AND METHODS:All long-term survivors of childhood NBL treated with (131) I-MIBG in the period 1989-1999 in our center (n = 16 of 43) were evaluated. During exposure to (131) I-MIBG, patients received 100 mg KI per day as thyroid protection. All MIBG images were evaluated for thyroid uptake of radio-iodine. Thyroid dysfunction was defined as a plasma thyrotropin concentration above the institutional age-related reference ranges (thyrotropin elevation, TE) or using thyroxine at last moment of follow-up. In all, ultrasound investigation of the thyroid was performed. RESULTS:Fifteen years after treatment with (131) I-MIBG, in 81% (n = 13) thyroid disorders were diagnosed. Eight survivors (50%) were treated with thyroxine. Thyroid nodules were found in nine survivors, of which two were diagnosed with papillary thyroid carcinoma. In 28% of (131) I-MIBG-images radio-iodine uptake in the thyroid gland was seen, but no correlation was found between thyroidal radio-iodine uptake and thyroid disorders. CONCLUSIONS:Despite protection with KI during exposure to (131) I-MIBG in childhood, the occurrence of thyroid disorders is high and increases in time. Continuous screening for thyroid dysfunction and nodules in these survivors is recommended. Other ways to protect the thyroid gland should be further evaluated.
journal_name
Pediatr Blood Cancerjournal_title
Pediatric blood & cancerauthors
Clement SC,van Eck-Smit BL,van Trotsenburg AS,Kremer LC,Tytgat GA,van Santen HMdoi
10.1002/pbc.24681subject
Has Abstractpub_date
2013-11-01 00:00:00pages
1833-8issue
11eissn
1545-5009issn
1545-5017journal_volume
60pub_type
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journal_title:Pediatric blood & cancer
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journal_title:Pediatric blood & cancer
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journal_title:Pediatric blood & cancer
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journal_title:Pediatric blood & cancer
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journal_title:Pediatric blood & cancer
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journal_title:Pediatric blood & cancer
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journal_title:Pediatric blood & cancer
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journal_title:Pediatric blood & cancer
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journal_title:Pediatric blood & cancer
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journal_title:Pediatric blood & cancer
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