Intrauterine Twin Discordancy and Partial Postnatal Catch-up Growth in a Girl with a Pathogenic IGF1R Mutation

Ocaranza P.; Losekoot M.; Walenkamp M.J.E.; De Bruin C.; Wit J.M.; Mericq V.

Abstract

Objective: Insulin like growth factors-I (IGF-1) is essential for normal in utero and postnatal human growth. It mediates its effects through the IGF-1 receptor (IGFIR), a widely expressed cell surface tyrosine kinase receptor. The aim of the study was to analyze pre- and post-natal growth, clinical features and laboratory findings in a small for gestational age (SGA) girl in whom discordant postnatal growth persisted and her appropriate for gestational age (AGA) brother. Methods: A girl born with a low weight and length [-2.3 and -2.4 standard deviation (SD) score (SDS), respectively] but borderline low head circumference (-1.6 SD) presented with a height of -1.7 SDS, in contrast to a normal height twin brother (0.0 SDS). IGF-I resistance was suspected because of elevated serum IGF- I levels. Results: Sequencing revealed the presence of a previously described pathogenic heterozygous mutation (p.Glu1050Lys) in the SGA girl which was not present in the parents nor in the AGA twin brother. Conclusion: The pathogenic IGFIR mutation in this girl led to intrauterine growth retardation followed by partial postnatal catch-up growth. Height in mid-childhood was in the lower half of the reference range, but still 1.7 SD shorter than her twin brother.

Más información

Título según WOS: Intrauterine Twin Discordancy and Partial Postnatal Catch-up Growth in a Girl with a Pathogenic IGF1R Mutation
Título según SCOPUS: Intrauterine twin discordancy and partial postnatal catch-up growth in a girl with a pathogenic IGF1R mutation
Título de la Revista: JOURNAL OF CLINICAL RESEARCH IN PEDIATRIC ENDOCRINOLOGY
Volumen: 11
Número: 3
Editorial: GALENOS YAYINCILIK
Fecha de publicación: 2019
Página de inicio: 293
Página final: 300
Idioma: English
DOI:

10.4274/jcrpe.galenos.2019.2018.0236

Notas: ISI, SCOPUS