Ann Pediatr Endocrinol Metab.  2018 Dec;23(4):235-239. 10.6065/apem.2018.23.4.235.

Nonautoimmune congenital hyperthyroidism due to p.Asp633Glu mutation in the TSHR gene

Affiliations
  • 1Department of Pediatrics, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Suwon, Korea.
  • 2Department of Pediatrics, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Korea. suhbk@catholic.ac.kr
  • 3Department of Laboratory Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Korea.

Abstract

Most cases of congenital hyperthyroidism are autoimmune forms caused by maternal thyroid stimulating antibodies. Nonautoimmune forms of congenital hyperthyroidism caused by activating mutations of the thyrotropin receptor (TSHR) gene are rare. A woman gave birth to a boy during an emergency cesarean section at 33 weeks of gestation due to fetal tachycardia. On the 24th day of life, thyroid function tests were performed due to persistent tachycardia, and hyperthyroidism was confirmed. Auto-antibodies to TSHR, thyroid peroxidase, and thyroglobulin were not found. The patient was treated with propylthiouracil and propranolol, but hyperthyroidism was not well controlled. At 3 months of age, the patient had craniosynostosis and hydrocephalus, and underwent a ventriculoperitoneal shunt operation. Direct sequencing of the TSHR gene showed a heterozygous mutation of c.1899C>A (p.Asp633Glu) in exon 10. No mutations were discovered in any of the parents in a familial genetic study. We have reported a case of sporadic nonautoimmune congenital hyperthyroidism, by a missense mutation of the TSHR gene, for the first time in South Korea.

Keyword

Hyperthyroidism; Nonautoimmune; Thyrotropin receptor; Germ-line mutation

MeSH Terms

Cesarean Section
Craniosynostoses
Emergencies
Exons
Female
Germ-Line Mutation
Humans
Hydrocephalus
Hyperthyroidism*
Immunoglobulins, Thyroid-Stimulating
Iodide Peroxidase
Korea
Male
Mutation, Missense
Parents
Parturition
Pregnancy
Propranolol
Propylthiouracil
Receptors, Thyrotropin
Tachycardia
Thyroglobulin
Thyroid Function Tests
Ventriculoperitoneal Shunt
Immunoglobulins, Thyroid-Stimulating
Iodide Peroxidase
Propranolol
Propylthiouracil
Receptors, Thyrotropin
Thyroglobulin

Figure

  • Fig. 1. Direct sequencing analysis of TSHR. The proband was heterozygous for the missense mutation c.1899C>A (p.Asp633Glu). The same base change was not present in his father or mother. The base substitution mutation is indicated by a red arrow.


Cited by  1 articles

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Jung Hyun Shin, Go Hun Seo, Seung Hwan Oh, Woo Yeong Chung, Hye Young Kim, Young Mi Kim, Mi Hye Bae, Kyung Hee Park, Min Jung Kwak
Ann Pediatr Endocrinol Metab. 2020;25(4):282-286.    doi: 10.6065/apem.2040076.038.


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