Usefulness of Measuring Thyroid Stimulating Antibody at the Time of Antithyroid Drug Withdrawal for Predicting Relapse of Graves Disease
Autor: | Hyemi Kwon, Won Gu Kim, Eun Kyung Jang, Mijin Kim, Suyeon Park, Min Ji Jeon, Tae Yong Kim, Jin-Sook Ryu, Young Kee Shong, Won Bae Kim |
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Jazyk: | English<br />Korean |
Rok vydání: | 2016 |
Předmět: | |
Zdroj: | Endocrinology and Metabolism, Vol 31, Iss 2, Pp 300-310 (2016) |
Druh dokumentu: | article |
ISSN: | 2093-596X 2093-5978 |
DOI: | 10.3803/EnM.2016.31.2.300 |
Popis: | BackgroundHyperthyroidism relapse in Graves disease after antithyroid drug (ATD) withdrawal is common; however, measuring the thyrotropin receptor antibody (TRAb) at ATD withdrawal in order to predict outcomes is controversial. This study compared measurement of thyroid stimulatory antibody (TSAb) and thyrotropin-binding inhibitory immunoglobulin (TBII) at ATD withdrawal to predict relapse.MethodsThis retrospective study enrolled patients with Graves disease who were treated with ATDs and whose serum thyroid-stimulating hormone levels were normal after receiving low-dose ATDs. ATD therapy was stopped irrespective of TRAb positivity after an additional 6 months of receiving the minimum dose of ATD therapy. Patients were followed using thyroid function tests and TSAb (TSAb group; n=35) or TBII (TBII group; n=39) every 3 to 6 months for 2 years after ATD withdrawal.ResultsTwenty-eight patients (38%) relapsed for a median follow-up of 21 months, and there were no differences in baseline clinical characteristics between groups. In the TSAb group, relapse was more common in patients with positive TSAb at ATD withdrawal (67%) than patients with negative TSAb (17%; P=0.007). Relapse-free survival was shorter in TSAb-positive patients. In the TBII group, there were no differences in the relapse rate and relapse-free survivals according to TBII positivity. For predicting Graves disease relapse, the sensitivity and specificity of TSAb were 63% and 83%, respectively, whereas those of TBII were 28% and 65%.ConclusionTSAb at ATD withdrawal can predict the relapse of Graves hyperthyroidism, but TBII cannot. Measuring TSAb at ATD withdrawal can assist with clinical decisions making for patients with Graves disease. |
Databáze: | Directory of Open Access Journals |
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