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Updated: Jul 30, 2025

Determining the Likelihood of Variant Pathogenicity Using Amino Acid-level Signal-to-Noise Analysis of Genetic Variation
Published on: January 16, 2019
Pathogenic Presentation of a Variant of Uncertain Significance in a Puerto Rican Patient With Wiedemann-Steiner
Fabiola A Benítez Ríos1, Laura F Rodríguez-Fernández1, Norma J Arciniegas2,3
1Biochemistry, Ponce Health Sciences University, Ponce, PRI.
Abstract:
Wiedemann-Steiner syndrome (WDSTS) is an autosomal dominant disorder that is caused by mutations in the KMT2A gene. This case reports a two-year-old male's diagnosis of WDSTS via a heterozygous variant of uncertain significance (VUS) (c.11735G>A(p.Cys3912Tyr). The patient's phenotypic presentation was remarkable for hypertrichosis, intellectual disability, intermittent aggressive behavior, developmental delay, failure to thrive, low weight, and the distinct facial features of long eyelashes, telecanthus, corrected strabismus, down-slanting palpebral fissures, and a wide nasal bridge with a broad tip. The importance of this case report stands on the principle of genetic evaluation in patients with ambiguous clinical presentations. In the future, molecular analysis of VUS with pathogenic clinical features can lead to targeted medical management and counseling.
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