Child Neurology: TRAPPC4-Related Neurodevelopmental Disorder.

Forno, Andreia; Oliveira, Joana; Amorim, Marta Zegre; Conceição, Carla; Sousa, Paulo Rego · Neurology · 2025

case_report · Level V

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Abstract

Neurodevelopmental disorder with epilepsy, spasticity, and brain atrophy, first described in 2020, is associated with autosomal recessive inheritance of pathogenic variant in the <i>TRAPPC4</i> gene. Given a relatively high carrier frequency, it is crucial to recognize and consider this diagnosis. We report 2 sisters with pathogenic homozygous variants (c.454+3A>G) in the <i>TRAPPC4</i> gene, diagnosed after an extensive and time-consuming clinical investigation. This report reviews the phenotypic spectrum of TRAPPC4-related neurodevelopmental disorder, particularly homozygous pathogenic variant c.454+3A>G in <i>TRAPPC4</i>, to raise awareness of this diagnosis.

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