Long-term outcome of low-activity radioiodine administration preceded by adjuvant recombinant human TSH pretreatment in elderly subjects with multinodular goiter

Large multinodular goiter (MNG) in elderly people is a common finding which can require intervention. The long-term effect of radioiodine therapy on thyroid volume (TV) and function after recombinant human (rh) TSH pre-treatment was evaluated. After baseline evaluation, 40 subjects over 60 years old...

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Bibliographic Details
Published in:	Thyroid research Vol. 2; no. 1; p. 6
Main Authors:	Giusti, Massimo, Caputo, Mauro, Calamia, Iolanda, Bagnara, Mariaclaudia, Ceresola, Enrica, Schiavo, Mara, Mussap, Michele, Ferone, Diego, Minuto, Francesco, Bagnasco, Marcello
Format:	Journal Article
Language:	English
Published:	England BioMed Central Ltd 30-06-2009 BioMed Central BMC
Subjects:	Aged Care and treatment Goiter Health aspects Iodine Isotopes Physiological aspects Thyrotropin Italy
Online Access:	Get full text
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Summary:	Large multinodular goiter (MNG) in elderly people is a common finding which can require intervention. The long-term effect of radioiodine therapy on thyroid volume (TV) and function after recombinant human (rh) TSH pre-treatment was evaluated. After baseline evaluation, 40 subjects over 60 years old with a large MNG were treated with 131I up to the activity of 600 MBq. Nineteen patients were pretreated with rhTSH (0.1 mg on 2 consecutive days; group 1) while 21 subjects underwent treatment without rhTSH pretreatment (group 2). TV was monitored every 6-12 months by ultrasonography. The median follow-up period was 36 months. At the baseline, the groups matched in terms of TV, 24-h radioiodine uptake (RAIU), urinary iodine and neck complaints. The number of subjects pretreated with anti-thyroid drugs was significantly (P = 0.01) greater in group 2 than in group 1; TSH was more suppressed (P = 0.003) and f-T3 was more elevated (P = 0.005) in group 2 than in group 1 patients. RhTSH increased 24-h RAIU in group 1 up to the baseline level observed in group 2. The 131I activity administered was similar in both groups. Adverse events were slight and similar in both groups. A permanent post-radioiodine toxic condition was reported only in 2 patients in group 2. After radioiodine therapy, hypothyroidism was observed in significantly more group 1 patients than group 2 patients (P = 0.002). While TV was reduced in both groups, the percentage TV reduction recorded at the last examination was significantly higher (P = 0.03) in group 1 than in group 2. MNG-related complaints were significantly reduced in both group 1 (P = 0.0001 vs baseline) and group 2 (P = 0.001) patients. Low radioiodine activities after pretreatment with low-dosage rhTSH are able to reduce TV and improve MNG-related symptoms in elderly subjects.
ISSN:	1756-6614 1756-6614
DOI:	10.1186/1756-6614-2-6