ESPE Abstracts

Background: Thyroid hormones act via receptors (TRα; TRβ) encoded by separate genes (THRA, THRB). Mutations in THRA are a recently-recognised cause of Resistance to Thyroid Hormone alpha (RTHα), a disorder with tissue-specific hypothyroidism but near-normal thyroid function tests.Aim: We describe the youngest recorded case of RTHa, in a 2yr old boy with disproportionate short stature, ...

Background: Resistance to thyroid hormone beta (THRβ) is a clinical spectrum which varies in presentation even between individuals with the same mutation. Life-threatening cardiac dysfunction is recognized in homozygous THRβ state but never reported in cases of inherited heterozygous THRβ defects.Aim: We report the first case of familial inherited heterozygous (THRB) beta mutation presenting with ...

Background: Primary IGF1 deficiency (PIGFD) is a rare disease defined by low IGF1 levels, GH sufficiency and absence of secondary causes of growth failure. Whereas some members of the GH–IGF axis have been shown to be implicated in the severe syndromic forms of PIGFD due to GH insensitivity, genetic causes of less severely affected patients are mostly unknown.Objective and hypotheses: The aim of the present study was to systematically investigate fr...

Background: Primary IGF1 deficiency (PIGFD) is a rare condition defined by low IGF1 levels, GH sufficiency and absence of secondary causes of growth failure. PIGFD is an approved indication for treatment with recombinant IGF1 (rIGF1). Its genetic causes remain largely unknown.Objective and hypotheses: To elucidate genetic causes of PIGFD.Method: Clinical phenotyping followed by trio-based whole-exome sequencing (WES) in 11 complete...