This article [1] investigates long-term progression of Graves' disease (GD) patients who were followed up for >5 years. GD is the most common cause of hyperthyroidism in children, accounting for about 95% of cases in Korea [2]. The optimal GD treatment in children is controversial. Antithyroid drugs (ATDs) are convenient and prevent permanent hypothyroidism and are primarily used as an initial treatment for children [3]. However, the rate of GD remission with ATD treatment alone is low, and there are no clinical guidelines on the timing of ATD treatment cessation in children and adolescents [1]. Additionally, there are few studies about the efficacy and disease progression in children and adolescents on long-term ATD therapy [1,4].
Relapse and remission rates after discontinuing ATD therapy vary by study. Factors associated with remission include higher body mass index standard deviation score, smaller goiter size, lower initial T3 level, and older age [5]. It also has been proposed that higher antimicrosomal antibody level, higher thyroid-stimulating hormone (TSH) level, and lower antithyroglobulin antibody level are related to remission [5], although any one of these factors alone is insufficient to predict remission of hyperthyroidism [1,4].
This study demonstrated the value of TSH-binding inhibitory immunoglobulin (TBII) as a predictor of remission during the 5 years after ATD treatment. They showed that the remission group had significant relationships with a shorter time to TBII normalization and lower level of TBII. Although this article has some limitations, it is a relatively long-term analysis of patient data over 5 years, and it will be a valuable resource for researchers who want to predict the course of GD patients in children and adolescents through larger samples and longer-term data. It will also serve as a cornerstone for long-term treatment guidelines.
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