hrp0095p1-529 | Growth and Syndromes | ESPE2022

A case of Silver Russell Syndrome-like phenotype with abnormal methylation of the imprinted GNAS locus (20q13)

Festa Adalgisa , Luongo Caterina , Aiello Francesca , Santoro Claudia , Piluso Giulio , Torella Annalaura , Del Vecchio Blanco Francesca , Nigro Vincenzo , Miraglia del Giudice Emanuele , Grandone Anna

Background: Silver Russell Syndrome (SRS) is characterized by pre- and postnatal growth failure, relative macrocephaly at birth, prominent forehead, feeding difficulties and body asymmetry. The diagnosis is clinical, the genetic mechanisms involved are different, in 50% of cases loss of methylation (LOM) at the paternal H19/IGF2:IG-DMR (chr11p15.5), in 10% of cases maternal uniparental disomy of chromosome 7 (UPD(7)mat), cases of maternal uniparental ...