NONO-related X-linked intellectual disability syndrome: further clinical and molecular delineation.

The X-linked NONO gene encodes Non-Pou Domain-Containing Octamer-Binding Protein, a multifunctional member of the DBHS family involved in transcriptional regulation, RNA splicing and DNA repair. Pathogenic variants in NONO cause Intellectual Developmental Disorder, X-linked Syndromic (MIM #300967), characterised by intellectual disability, neurodevelopmental delay, cardiomyopathy, such as left ventricular non-compaction (LVNC), and congenital heart defects such as including atrial septal defect (ASD), ventricular septal defect (VSD), patent ductus arteriosus (PDA), and patent foramen ovale (PFO). This study reports three new patients with pathogenic hemizygous frameshift variants in NONO identified with exome sequencing, broadening the clinical presentation.

The p.R66W Variant in Causes Severe Fetopathy Through Variant-Specific Mechanisms.

encodes a small GTPase of the Rho family that plays a critical role in actin cytoskeleton remodeling and intracellular signaling regulation. Pathogenic variants in , all of which reported thus far affect conserved residues within its functional domains, have been linked to neurodevelopmental disorders characterized by diverse phenotypic features, including structural brain anomalies and facial dysmorphism (NEDBAF). Recently, a novel de novo variant (NM_005052.

Septo-optic dysplasia plus: A case report for reviewing and recognizing this condition.

Septo-optic dysplasia is a congenital neurological condition with multifactorial etiology, characterized by septum pellucidum agenesis and/or corpus callosum dysgenesis, hypoplasia of the chiasm or optic nerves, and hormonal dysfunction with pituitary or hypothalamic alterations. Diagnosis requires two of these criteria and magnetic resonance is the imaging test of choice. Most cases present with abnormalities of cortical development in the form known as septo-optic dysplasia plus.

Isolated Agenesis of the Corpus Callosum in a Four-Year-Old: A Case of Preserved Cognitive Function Despite Complete Corpus Callosum Absence.

Agenesis of the corpus callosum (AgCC) is a rare congenital brain anomaly characterized by the partial or complete absence of the corpus callosum, a crucial structure responsible for interhemispheric communication. Neurological outcomes associated with AgCC vary widely, with presentation ranging from severe intellectual disabilities to normal cognitive function. The condition is often discovered incidentally due to the variability in its clinical presentation.

Adaptive behavior in primary agenesis of the corpus callosum.

Background And Aims: Primary agenesis of the corpus callosum (ACC) is a congenital neurological disorder characterized by the absence, either partial or complete, of the corpus callosum in individuals who do not have intellectual disability and are otherwise neurologically asymptomatic. While mild to moderate neurocognitive deficits have been observed in individuals with primary ACC using neuropsychological assessments, the impact of this syndrome on adaptive behavior remains insufficiently understood.

Methods: This study used self- and informant-ratings on the Adaptive Behavior Assessment System, Second Edition (ABAS-II) to evaluate adaptive behavior in 35 adults diagnosed with primary ACC.

Colpocephaly and corpus callosum dysgenesis in an adult: A rare case report.

Introduction: Colpocephaly, a midline anomaly, may be associated with agenesis of the corpus callosum. While prenatal diagnosis is possible, this malformation is rarely detected in adults and may be asymptomatic.

Case Presentation: We present a case of a 54-year-old male with Colpocephaly and dysgenesis of the corpus callosum, incidentally diagnosed during an emergency department visit.

Genitopatellar Syndrome With a Novel Variant in the KAT6B Gene: Supporting Spectrum Delineation.

Genitopatellar syndrome (GPS) and Say-Barber-Biesecker-Young-Simpson syndrome (SBBYSS) are rare genetic disorders linked to mutations in the Lysine Acetyltransferase 6B (KAT6B) gene, affecting histone acetylation regulation and developmental processes. We present a case of an African American infant with classic GPS features and a novel KAT6B gene mutation (c.4066del, p.

The Aggravation of Neuropsychiatric Symptoms in the Offspring of a Korean Family with Intellectual Disability and Developmental Delay Caused by a Novel p.Lys385Ter Variant.

The mutations encompass a nearly continuous spectrum of neurodevelopmental disorders (NDDs), ranging from lissencephaly to Proud syndrome, as well as infantile spasms without brain malformations, and including both syndromic and non-syndromic intellectual disabilities (IDs). We describe worsening neuropsychiatric symptoms in the offspring of a Korean family with ID/developmental delay (DD) caused by a novel p.Lys385Ter variant.

Corpus callosal agenesis with gray matter heterotopia and bilateral eye coloboma in an infant: A case report.

Corpus callosal agenesis (CCA) is a rare congenital disorder characterized by the partial or complete absence of the corpus callosum, a structure crucial for interhemispheric communication. CCA can occur in isolation or be associated with other anomalies such as heterotopia, holoprosencephaly, cerebellar hypoplasia, coloboma, and hydrocephalus. The prevalence of CCA ranges from 0.

The corpus callosum and creativity revisited.

In 1969 Joseph Bogen, a colleague of Roger Sperry and the neurosurgeon who performed commissurotomy on Sperry's "split-brain" study participants, wrote an article subtitled "The Corpus Callosum and Creativity." The article argued for the critical role of the corpus callosum and hemispheric specialization in creativity. Building on a four-stage model of creativity (learning, incubation, illumination, refinement) and Sperry's innovative studies, the Bogens posited that in the intact brain, creativity relies on two opposing functions of the corpus callosum: (a) interhemispheric inhibition to facilitate simultaneous and independent activity of uniquely-specialized processing centers during and and (b) interhemispheric facilitation to support the increased bi-hemispheric integration and coordination which produces This article revisits the Bogens' theory considering scientific discoveries over the past 50 years.

Adynamic spoken language in corpus callosum dysgenesis.

Corpus callosum dysgenesis (CCD) is a congenital brain malformation that occurs when the development of the corpus callosum is disrupted, either partially or completely. The cognitive outcomes in individuals with CCD vary greatly, but generally the neuropsychological profile is characterised by slow processing speed, poor transfer of interhemispheric sensory-motor information, and impaired complex problem solving. Core language skills are often preserved in CCD, but there is some evidence that complex language may be impaired.

Imagawa-Matsumoto Syndrome: The First Case From Turkey.

Imagawa-Matsumoto syndrome (IMMAS; MIM #618786) is an autosomal dominant syndrome characterized by overgrowth, dysmorphic features, musculoskeletal abnormalities, developmental delay, and intellectual disability. The first case was reported in 2017 and has subsequently been diagnosed in only another 12 patients. We also present the first IMMAS patient from Turkey.

A rare case report: The value of fetal MRI to detect diprosopus twins.

Diprosopus is one of the rarest types of conjoined twins, caused by incomplete zygote separation in early pregnancy. It defines a condition with duplication of facial structures, monocephalic and 1 trunk. Early detection is difficult, but fetal MRI plays an important role in strengthening antenatal diagnosis of conjoined twin pregnancies and other major congenital abnormalities, complementing antenatal ultrasonography.