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ABSTRACT: Rationale
Simpson-Golabi-Behmel syndrome type 1 (SGBS1) is caused by mutations in GPC3 or in both GPC3 and GPC4. Physical manifestations of SGBS1 include fetal overgrowth and macrostomia, macroglossia. Subclinical hypothyroidism has never been reported in SGBS1 cases.Patient concerns
An 8-days-old boy was referred to our hospital with persistent hypoglycemia and special facies. And the infant showed elevated levels of thyroid-stimulating hormone (TSH). Free T4 and free T3 were normal.Diagnoses
Definitive diagnosis of SGBS1 depends on clinical features and genetic testing. A nonsense mutation (c.1515C > A, p. Cys505*) was tested by whole-exome sequencing.Interventions
Normal blood glucose levels were maintained with glucose infusions. Levothyroxine was given to the patient for treating subclinical hypothyroidism.Outcomes
The parents decided to abandon the treatment of the patient. We learned that the patient died of a lung infection by a telephone follow-up.Lessons
Subclinical hypothyroidism could be added to the known clinical manifestations of SGBS1.
SUBMITTER: Zhang J
PROVIDER: S-EPMC6824639 | biostudies-literature | 2019 Oct
REPOSITORIES: biostudies-literature
Medicine 20191001 43
<h4>Rationale</h4>Simpson-Golabi-Behmel syndrome type 1 (SGBS1) is caused by mutations in GPC3 or in both GPC3 and GPC4. Physical manifestations of SGBS1 include fetal overgrowth and macrostomia, macroglossia. Subclinical hypothyroidism has never been reported in SGBS1 cases.<h4>Patient concerns</h4>An 8-days-old boy was referred to our hospital with persistent hypoglycemia and special facies. And the infant showed elevated levels of thyroid-stimulating hormone (TSH). Free T4 and free T3 were no ...[more]