Rubinstein-Taybi syndrome in a Saudi boy with distinct features and variants in both the CREBBP and EP300 genes: a case report, BMC Medical Genetics

Background Rubinstein-Taybi syndrome (RSTS) Type 1 (OMIM 180849) is characterized by three main features: intellectual disability; broad and frequently angulated thumbs and halluces; and characteristic facial dysmorphism. Case presentation We report on a Saudi boy with RSTS Type 1 and the following distinct features: a midline notch of the upper lip, a bifid tip of the tongue, a midline groove of the lower lip, plump fingers with broad / flat fingertips, and brachydactyly. The child was found to be heterozygous in the CREBBP gene for a sequence variant designated c.4963del, which is predicted to result in premature protein termination p.Leu1655Cysfs*89. The child and his father were also found to be heterozygous in the EP300 gene for a sequence variant designated c.586A > G, which is predicted to result in the amino-acid substitution p.Ile196Val. Conclusion Our report expands the clinical spectrum of RSTS to include several distinct facial and limb features. The variant of the CREBBP gene is known to be causative of RSTS Type 1. The variant in the EP300 gene is benign since the father carried the same variant and exhibited no abnormalities. However, functional studies are required to investigate if this benign EP300 variant influences the phenotype in the presence of disease-causing CREBBP gene mutations.

Frontiers Genetic Diagnosis of Rubinstein–Taybi Syndrome With Multiplex Ligation-Dependent Probe Amplification (MLPA) and Whole-Exome Sequencing (WES): Case Series With a Novel CREBBP Variant

Fetal phenotype of Rubinstein‐Taybi syndrome caused by CREBBP mutations - Van‐Gils - 2019 - Clinical Genetics - Wiley Online Library

PDF) An unusual presentation of Rubinstein-Taybi Syndrome with bilateral postaxial polydactyly Corresponding author

PDF) Lacrimal drainage anomalies in Rubinstein-Taybi syndrome: case report and review of literature

Frontiers Genetic Diagnosis of Rubinstein–Taybi Syndrome With Multiplex Ligation-Dependent Probe Amplification (MLPA) and Whole-Exome Sequencing (WES): Case Series With a Novel CREBBP Variant

Patient 1 showing a mild RTS variant (incomplete RTS). (A, B) Note

Rubinstein-Taybi syndrome in a Saudi boy with distinct features and variants in both the CREBBP and EP300 genes: a case report, BMC Medical Genetics

PDF] Chromosome 16p13.3 Contiguous Gene Deletion Syndrome including the SLX4, DNASE1, TRAP1, and CREBBP Genes Presenting as a Relatively Mild Rubinstein–Taybi Syndrome Phenotype: A Case Report of a Saudi Boy

Frontiers Behavioral and neuropsychiatric challenges across the lifespan in individuals with Rubinstein-Taybi syndrome

First case of Rubinstein–Taybi syndrome with desquamation associated with a novel mutation in the bromodomain of the CREBBP gene - Wang - 2019 - Clinical and Experimental Dermatology - Wiley Online Library

Exon deletions of the EP300 and CREBBP genes in two children with Rubinstein –Taybi syndrome detected by aCGH

De novo variation in EP300 gene cause Rubinstein-Taybi syndrome 2 in a Chinese family with severe early-onset high myopia, BMC Medical Genomics