Isolated Growth Hormone Deficiency Type 2 due to a novel GH1 Mutation: A Case Report

Ahmad Kautsar, Jan M. Wit, Aman Pulungan

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Isolated growth hormone (GH) deficiency (IGHD) type 2 is a rare autosomal dominant disorder characterized by severe short stature with low GH level. Timely diagnosis is important for optimal results of recombinant human GH (rhGH) treatment and detection of additional pituitary deficiencies in affected relatives. A male child presented at the age of one year with severe, proportionate short stature [-4.9 standard deviation score (SDS)] and with a normal body mass index (-1.1 SDS). Physical examination revealed frontal bossing, midfacial hypoplasia, normal external genitalia and no dysmorphic features. Paternal and maternal heights were -6.1 and -1.9 SDS. Serum insulin-like growth factor-1 (IGF-1) and IGF-binding protein-3 were undetectable and the peak GH concentration by clonidine stimulation test was extremely low (0.18 ng/mL). Brain magnetic resonance imaging showed anterior pituitary hypoplasia. Genetic analysis identified a novel heterozygous mutation (c.291+2T>G) expected to lead to splicing out exon 3 of GH1. rhGH from age 2.4 years led to appropriate catch-up. In conclusion, we identified a novel GH1 gene mutation in an infant with classical IGHD type 2 presentation.

Original languageEnglish
Pages (from-to)426-431
Number of pages6
JournalJournal of clinical research in pediatric endocrinology
Volume11
Issue number4
DOIs
Publication statusPublished - 22 Nov 2019

Keywords

  • GH1
  • Growth hormone
  • isolated growth hormone deficiency
  • short stature

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