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Journal of Pediatric Neurology 2023; 21(05): 360-364
DOI: 10.1055/s-0042-1743435
Case Report

A Newly Identified Int22h1/Int22h2‐Mediated Xq28 Duplication Syndrome Case Misdiagnosed as Cerebral Palsy

Paulo André Dias Bastos 
1   Chronic Diseases Research Centre, NOVA Medical School, Faculty of Medical Sciences, Universidade Nova de Lisboa, Lisbon, Portugal
2   Department of Neurology, Hospital de Egas Moniz, Centro Hospitalar de Lisboa Ocidental, Lisbon, Portugal
,
Raquel Barbosa 
1   Chronic Diseases Research Centre, NOVA Medical School, Faculty of Medical Sciences, Universidade Nova de Lisboa, Lisbon, Portugal
2   Department of Neurology, Hospital de Egas Moniz, Centro Hospitalar de Lisboa Ocidental, Lisbon, Portugal
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Abstract

Cerebral palsy (CP) is a nonprogressive, early-onset neurodevelopmental disorder affecting ∼2 to 3/1,000 children worldwide. It is characterized by movement/postural disabilities accompanied by sensitive, perceptual, cognitive, communicational, behavioral, and musculoskeletal perturbations. Many CP patients are thought to have genetic etiologies overlapping those of other neurodevelopmental conditions. Herein, we reported a newly discovered case (the 36th case to date) of a female patient (misdiagnosed with CP until age 19) with the rare X-linked intellectual disability syndrome resulting from an int22h1/int22h2-mediated Xq28 duplication. A microarray analysis revealed a ∼0.4 Mb duplication within the 154.1 to 154.6 Mb subregion of Xq28 (hg19, CRCh37), confirming a diagnosis of the rare int22h1/int22h2-mediated Xq28 duplication intellectual disability syndrome. Atypical T2 hyperintensities were also observed. This case report builds upon the limited cohort of X-linked intellectual disability syndrome patients and reiterates the growing observations pertaining to the phenotypic overlap between genetic CP cases and other neurodevelopmental disorders.

Keywords

chromosomal anomaly - X-linked intellectual disability - chromosomal microarray analysis - cerebral palsy - gene dosage


Publication History

Received: 27 October 2021

Accepted: 08 January 2022

Article published online:
04 March 2022

© 2022. Thieme. All rights reserved.

Georg Thieme Verlag KG
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