# 17q21.31 Microduplication Syndrome in a Patient with Autism Spectrum Disorder, Macrocephaly, and Intellectual Disability

## TL;DR

This paper reports a new case of a rare genetic syndrome linked to autism, intellectual disability, and macrocephaly.

## Contribution

The study presents a new case with previously unreported clinical features of the 17q21.31 microduplication syndrome.

## Key findings

- The patient exhibited classical features of 17q21.31 microduplication syndrome.
- New clinical characteristics were observed in the reported case.
- Array-CGH confirmed a partial duplication of chromosome 17's long arm.

## Abstract

The chromosome 17q21.31 microduplication syndrome is a rare genetic syndrome presenting with craniofacial dysmorphisms, psychomotor delay, microcephaly, behavioral disorders, and poor social interaction. Only ten patients have been reported in the literature until today. All patients share some specific features, including psychomotor delay, behavioral disorders, and autism spectrum disorder (ASD). Here, a new case of this syndrome is reported in an 11-year-old Caucasian child who presented the classical clinical features of the 17q21.31 microduplication syndrome in association with new clinical characteristics previously unreported. The Array-Comparative Genomic Hybridization (aCGH) revealed a partial duplication of the long arm of chromosome 17. A literature review of previously studied patients with 17q21.31 microduplication syndrome is reported.