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Understanding the clinical manifestations of 16p11.2 deletion syndrome: a series of developmental case reports in children.

Abstract：

BACKGROUND:Copy number variants (CNVs) are genetic rearrangements, such as deletions and duplications, which result in a deviation from the normal number of copies of a given gene segment. CNVs are implicated in many neuropsychiatric disorders. Deletions of the human chromosomal region 16p11.2 are one of the most common genetic linkages to autism spectrum disorders (ASD). However, ASD is not the only presenting feature, and many patients with 16p11.2 deletions present with a variable clinical spectrum. METHODS:To better understand the nature and presentation of the syndrome throughout development, we present three different, unrelated clinical cases of children with 16p11.2 deletion and provide a detailed description of their clinical manifestations. RESULTS:Cognitive and motor impairments were characteristic of all three patients with 16p11.2 deletion, despite the differences in the extent and clinical presentation of impairment. Two patients had a clinical diagnosis of ASD and one showed several ASD traits. In addition, two patients also had severe speech and language impairments, which is in line with previous reports on 16p11.2 phenotypes. Although epilepsy and obesity have been frequently associated with 16p11.2 deletion, only one patient had a diagnosis of epilepsy and none of the three cases were obese. CONCLUSION:This variation in clinical phenotype renders correct clinical interpretation and diagnosis challenging. Therefore, it is critical to elucidate the variable clinical phenotypes of rare CNVs, including 16p11.2 deletions, to help guide clinical monitoring and counselling of patients and families.

journal_name

Psychiatr Genet

journal_title

Psychiatric genetics

authors

Fetit R,Price DJ,Lawrie SM,Johnstone M

doi

10.1097/YPG.0000000000000259

subject

Has Abstract

pub_date

2020-10-01 00:00:00

pages

136-140

issue

5

eissn

0955-8829

issn

1473-5873

journal_volume

30

pub_type

杂志文章

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