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Review
. 2020 Dec;8(12):e1544.
doi: 10.1002/mgg3.1544. Epub 2020 Nov 7.

DYRK1A pathogenic variants in two patients with syndromic intellectual disability and a review of the literature

Collaborators, Affiliations
Review

DYRK1A pathogenic variants in two patients with syndromic intellectual disability and a review of the literature

Laura E Meissner et al. Mol Genet Genomic Med. 2020 Dec.

Abstract

Background: DYRK1A-Related Intellectual Disability Syndrome is a rare autosomal dominant condition characterized by intellectual disability, speech and language delays, microcephaly, facial dysmorphism, and feeding difficulties. Affected individuals represent simplex cases that result from de novo heterozygous pathogenic variants in DYRK1A (OMIM 614104), or chromosomal structural rearrangements involving the DYRK1A locus. Due to the rarity of DYRK1A-Related Intellectual Disability Syndrome, the spectrum of symptoms associated with this disease has not been completely defined.

Methods and results: We present two unrelated cases of DYRK1A-Related Intellectual Disability Syndrome resulting from variants in DYRK1A. Both probands presented to the National Institutes of Health (NIH) with multiple dysmorphic facial features, primary microcephaly, absent or minimal speech, feeding difficulties, and cognitive impairment; features that have been previously reported in individuals with DYRK1A. During NIH evaluation, additional features of enlarged cerebral subarachnoid spaces, retinal vascular tortuosity, and bilateral anomalous large optic discs with increased cup-to-disc ratio were identified in the first proband and multiple ophthalmologic abnormalities and sensorineural hearing loss were identified in the second proband.

Conclusion: We recommend that the workup of future of patients include a comprehensive eye exam. Early establishment of physical, occupational, and speech therapy may help in the management of ataxia, hypertonia, and speech impairments common in these patients.

Keywords: DYRK1A; Down syndrome; autosomal dominant mental retardation 7; feeding difficulties; microcephaly.

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Conflict of interest statement

The authors declare that they have no competing interests.

Figures

FIGURE 1
FIGURE 1
Magnetic resonance imaging of the brain. (a) sagittal and (b) coronal plane showing widened cerebral subarachnoid space, cerebral ventriculomegaly, and generalized mild cerebral cortex volume loss
FIGURE 2
FIGURE 2
(a) and (b) Proband 1 at 2 years, 7 months. Image displays typical facial gestalt including microtia, deeply set eyes, thin upper lip vermilion, flat philtrum, and triangular face. (c) and (d) Proband 2 at 12 years, 8 months. Image displays narrow facies, low‐set ears with cupped right ear and simple deformed helix on the left, mild hypertelorism, and mid‐face malar hypoplasia

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