# Case Report: An adult with NCKAP1-related neurodevelopmental disorder and autism spectrum disorder

## TL;DR

This case report describes a 43-year-old man with a rare NCKAP1 gene variant causing neurodevelopmental and autism spectrum disorder symptoms.

## Contribution

The report provides the first documented case of NCKAP1-related disorder in a middle-aged adult.

## Key findings

- The patient exhibited features of autism spectrum disorder and intellectual disability.
- This case expands the known age range for NCKAP1-related neurodevelopmental disorder.
- Speech-language problems and seizures were also observed in the adult patient.

## Abstract

We describe a 43-year-old man with neurodevelopmental disorder (NDD) with features of autism spectrum disorder (ASD) due to a rare pathogenic variant in the NCKAP1 gene. There are only 5 young adults described in the literature with NCKAP1-related NDD; there are currently no reports of middle-aged or elderly adults with the condition. The most common clinical characteristics include ASD, intellectual disability (ID), speech-language problems, repetitive behaviors, and seizures.

This case report highlights an adult phenotype of NCKAP1-related NDD with goals to 1.) contribute insight into a rare genetic variant leading to NDD with ASD features and 2.) highlight adult manifestations of NCKAP1-related NDD as a patient in middle adulthood with the condition has not yet been reported.