Background: Coffin-Siris syndrome (CSS) is a neurodevelopmental disorder characterized by somatic dysmorphic features, developmental and speech delay. It is due to mutations in many different genes, belonging to BAF chromatin-remodelling complex. The last gene involved in this complex, recently individuated and related to CSS, was DPF2, although only nine patients have been reported until now.
Method: Here we report on a boy with a history of developmental delay, especially regarding speech and language, and dysmorphic features resembling a syndromic condition. Array-Comparative Genomic Hybridization (CGH) and a custom Next Generation Sequencing (NGS) panel including developmental delay related genes were executed.
Results: Array-CGH was negative while NGS panel revealed a novel mutation in DPF2 gene.
Conclusions: We add the clinical description of another patient with a novel mutation in DPF2, with a mild phenotype, thus trying to contribute to enlarge CSS phenotypic variability. Moreover, we briefly discuss about cohesinopathies and major differential diagnosis among syndromes with phenotypes overlapping to CSS.
Keywords: Fourth-finger brachydactyly; Growth delay; Neurodevelopmental disorders; Rubinstein Taybi syndrome; Speech impairment.
Copyright © 2019 The Japanese Society of Child Neurology. Published by Elsevier B.V. All rights reserved.