Compound Heterozygous ATM Variants Cause Adolescent‐Onset Cerebellar and Extrapyramidal Disease Without Telangiectasia in a Consanguineous Pakistani Family

Biallelic EZH1 Nonsense Novel Variant in Two Siblings with Neurodevelopmental Disorder and Central Precocious Puberty: A Case Report from a Consanguineous Saudi Family

This study expands the clinical, genetic, and molecular spectrum of EZH1-associated neurodevelopmental disorders by demonstrating that reduced EZH1 expression is consistent with a loss-of-function disease mechanism.

“Severe intellectual disability with cardiac and dermatologic involvement due to homozygous METTL23 frameshift mutation: a case report of two Turkish sisters”

Case Report: Clinical and molecular genetic analysis of a patient with coexisting complete androgen insensitivity syndrome and neurofibromatosis type 1 and 15pstk + polymorphism

This is the first report of concurrent CAIS and NF1, which enriches and expands the genotypic and phenotypic spectra of both disorders.

Homozygous Nonsense DSP Variants Selectively Affecting Desmoplakin I Cause Carvajal Syndrome in a Consanguineous Arabian Family with Four Affected Female Siblings

Introduction: Arrhythmogenic cardiomyopathy (ACM) is a myocardial disorder characterized by fibrofatty replacement of the myocardium and is associated with heart failure and sudden cardiac death. It can involve either ventricle, including left-dominant forms defined partly by genetic findings. Methods: We investigated a consanguineous family with four affected daughters presenting with ACM, epidermolytic palmoplantar keratoderma, and woolly hair. The two eldest siblings died suddenly during childhood. The remaining two affected siblings underwent genetic analysis using autozygosity mapping and whole-exome sequencing, followed by segregation analysis. Results: Autozygosity mapping identified a shared identity-by-descent (IBD) interval at the DSP locus on chromosome 6. Exome sequencing revealed a novel homozygous nonsense variant (c.4297C>T; p.Gln1433*; rs1554108283) in exon 23 of DSP. This variant introduces a premature termination codon within the region specific to transcript variant 1, sparing transcript variant 2. Both parents were heterozygous carriers. Cardiac imaging in the affected siblings demonstrated biventricular involvement, including left ventricular systolic dysfunction and right ventricular dilatation. Skin biopsy in one patient confirmed epidermolytic palmoplantar keratoderma. Conclusions: We describe a novel homozygous nonsense variant in the transcript 1-specific region of DSP causing Carvajal syndrome, characterized by severe biventricular ACM, epidermolytic palmoplantar keratoderma, and woolly hair, in a consanguineous Arabian family with four affected sisters.

Identification of a novel and a recurrent CDC45 variant in a Chinese family with Meier-Gorlin syndrome 7 and a literature review

A Chinese patient presenting with classic hallmarks of MGORS7 alongside atypical clinical features, including hearing and visual impairments is reported, suggesting that growth hormone therapy may be beneficial for growth retardation in patients with MGORS7.

SEPTIN9 R106W in a Chinese family with hereditary neuralgic amyotrophy: phenotypic heterogeneity and rehabilitation in a pediatric case

The broad clinical spectrum associated with the SEPTIN9 R106W mutation in a Chinese pedigree spanning from childhood to adulthood is delineated, highlighting the critical role of active inter vention in childhood-onset HNA.