학술논문
11p13 microduplication: a differential diagnosis of Silver-Russell syndrome?
Document Type
Academic Journal
Author
Amin AK; Department of Human Genetics, Medical Research Institute, Alexandria University, Alexandria, Egypt.; Krause J; Institute for Human Genetics and Genome Medicine, Medical Faculty, RWTH Aachen University, Pauwelsstr. 30, 52074, Aachen, Germany.; Eggermann T; Institute for Human Genetics and Genome Medicine, Medical Faculty, RWTH Aachen University, Pauwelsstr. 30, 52074, Aachen, Germany. teggermann@ukaachen.de.
Source
Publisher: BioMed Central Country of Publication: England NLM ID: 101317942 Publication Model: Electronic Cited Medium: Print ISSN: 1755-8166 (Print) Linking ISSN: 17558166 NLM ISO Abbreviation: Mol Cytogenet Subsets: PubMed not MEDLINE
Subject
Language
English
ISSN
1755-8166
Abstract
Background: Silver-Russel syndrome (SRS) is a congenital disorder which is mainly characterized by intrauterine and postnatal growth retardation, relative macrocephaly, and characteristic (facial) dysmorphisms. The majority of patients shows a hypomethylation of the imprinting center region 1 (IC1) in 11p15 and maternal uniparental disomy of chromosome 7 (upd(7)mat), but in addition a broad spectrum of copy number variations (CNVs) and monogenetic variants (SNVs) has been reported in this cohort. These heterogeneous findings reflect the clinical overlap of SRS with other congenital disorders, but some of the CNVs are recurrent and have therefore been suggested as SRS-associated loci. However, this molecular heterogeneity makes the decision on the diagnostic workup of patients with SRS features challenging.
Case Presentation: A girl with clinical features of SRS but negatively tested for the IC1 hypomethylation and upd(7)mat was analyzed by whole genome sequencing in order to address both CNVs and SNVs in the same run. We identified a 11p13 microduplication affecting a region overlapping with a variant reported in a previously published patient with clinical features of Silver-Russel syndrome.
Conclusions: The identification of a 11p13 microduplication in a patient with SRS features confirms the considerable contribution of CNVs to SRS-related phenotypes, and it strengthens the evidence for a 11p13 microduplication syndrome as a differential diagnosis SRS. Furthermore, we could confirm that WGS is a valuable diagnostic tool in patients with SRS and related disorders, as it allows CNVs and SNV detection in the same run, thereby avoiding a time-consuming diagnostic testing process.
(© 2024. The Author(s).)
Case Presentation: A girl with clinical features of SRS but negatively tested for the IC1 hypomethylation and upd(7)mat was analyzed by whole genome sequencing in order to address both CNVs and SNVs in the same run. We identified a 11p13 microduplication affecting a region overlapping with a variant reported in a previously published patient with clinical features of Silver-Russel syndrome.
Conclusions: The identification of a 11p13 microduplication in a patient with SRS features confirms the considerable contribution of CNVs to SRS-related phenotypes, and it strengthens the evidence for a 11p13 microduplication syndrome as a differential diagnosis SRS. Furthermore, we could confirm that WGS is a valuable diagnostic tool in patients with SRS and related disorders, as it allows CNVs and SNV detection in the same run, thereby avoiding a time-consuming diagnostic testing process.
(© 2024. The Author(s).)