1. Same-sex twins have a high incidence of congenital hypothyroidism and a high probability to be missed at newborn screening.
- Author
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Jiang, Xiang, Huang, Yong-lan, Feng, Yi, Tang, Fang, Jia, Xue-fang, Chen, Qian-yu, Tang, Cheng-fang, Liu, Si-chi, Li, Bei, Zheng, Rui-dan, and Liu, Ji-lian
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CONGENITAL hypothyroidism , *NEWBORN screening , *TWINS , *OTOACOUSTIC emissions ,PERINATAL care - Abstract
• Incidence of CH in same-sex twins is much higher than that in general population. • Distinguishing same-sex twins and different-sex twins is more feasible in screening. • In cases with a positive result in a same-sex twin, the other one should be recall. • Specific screening guidelines should be evaluated for all same-sex twins. We estimated the incidence of CH in twins, analyse the clinical features of CH cases in twins and further evaluate the CH screening strategy and recall procedures for twins. A retrospective investigation of the screening results and confirmed cases in 724,791 newborns was conducted from 2015 to 2017 in Guangzhou. Clinical features were compared between twins with CH and singletons with CH. In addition, the twins were further divided into same-sex twins and different-sex twins to analyse the characteristics and incidence of CH and to compare differences in the confirmed cases in the 2 groups. The incidence of CH in same-sex twins was 1/593, which was much higher than the incidence of CH in singletons (1/1323) and different-sex twins (1/3060). Of the 20 twins diagnosed with CH, 17 were same-sex twins and 3 were different-sex twins. Among the six pairs of same-sex twins with CH, four had TSH inconsistency, which reached 67%. Eight of the 17 cases of same-sex twins diagnosed with CH had negative results at the first screening. Distinguishing same-sex twins from different-sex twins during newborn screening is more feasible. The incidence of CH in same-sex twins is much higher than that in the general population and the risk of transient CH is relatively high. In positive cases in same-sex twins, the simultaneous recall of the twin can effectively avoid a missed diagnosis. The screening center should properly evaluate the recall strategy and screening procedure for twins, especially twins of the same-sex. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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