An autosomal-dominant childhood-onset disorder associated with pathogenic variants in VCP.

Valosin-containing protein (VCP) is an AAA+ ATPase that plays critical roles in multiple ubiquitin-dependent cellular processes. Dominant pathogenic variants in VCP are associated with adult-onset multisystem proteinopathy (MSP), which manifests as myopathy, bone disease, dementia, and/or motor neuron disease. Through GeneMatcher, we identified 13 unrelated individuals who harbor heterozygous VCP variants (12 de novo and 1 inherited) associated with a childhood-onset disorder characterized by developmental delay, intellectual disability, hypotonia, and macrocephaly.

Genetic counseling clinic model expansion: Impact on access for general genetics clinic.

Cincinnati Children's Hospital Medical Center (CCHMC) implemented a Genetic Counseling Clinic (GCC), where the appointment for a general genetics indication is conducted solely by a genetic counselor (GC). We conducted a retrospective chart review of 211 patient encounters scheduled in the GCC between January 1, 2022 and June 30, 2022 and collected patient demographics, wait time, appointment characteristics, referral indication, and clinical recommendations. To study impact on patient access, we compared patient demographics and appointment characteristics with 912 patient encounters scheduled in the General Genetics Clinic with a geneticist during the same time period.

Imaging Similarities Between Oral-Facial-Digital Syndrome Type 1 and Aicardi Syndrome: Prenatal and Postnatal Magnetic Resonance Imaging (MRI) Findings in 4 Patients.

Prenatal identification by magnetic resonance imaging (MRI) of callosal anomalies, particularly with accompanying intracranial abnormalities, poses a challenge for accurate prognostication and fetal counseling as outcome can vary widely depending on underlying etiology. In female patients, Aicardi syndrome is an important consideration, and prompt postnatal ophthalmologic assessment to identify ocular stigmata of Aicardi syndrome can aid with anticipatory guidance and greater vigilance for seizures. We present a case of a female with fetal and postnatal MRI findings of agenesis of corpus callosum and type 2b interhemispheric cysts, characteristically found in Aicardi syndrome, but was found to have oral-facial-digital syndrome type 1 (OFD1).

Bi-allelic CAMSAP1 variants cause a clinically recognizable neuronal migration disorder.

Non-centrosomal microtubules are essential cytoskeletal filaments that are important for neurite formation, axonal transport, and neuronal migration. They require stabilization by microtubule minus-end-targeting proteins including the CAMSAP family of molecules. Using exome sequencing on samples from five unrelated families, we show that bi-allelic CAMSAP1 loss-of-function variants cause a clinically recognizable, syndromic neuronal migration disorder.

Epilepsy phenotypes associated with MAP1B-related brain malformations.

Recently, studies on whole-exome sequencing (WES) of large cohorts of people with periventricular heterotopia (PVH) have reported an association with loss-of-function variants in the MAP1B gene. However, neurological phenotypes of these patients remain poorly characterized. Four family members with seizures beginning in early childhood were evaluated.