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TANGO2: expanding the clinical phenotype and spectrum of pathogenic variants.


ABSTRACT: PURPOSE:TANGO2-related disorders were first described in 2016 and prior to this publication, only 15 individuals with TANGO2-related disorder were described in the literature. Primary features include metabolic crisis with rhabdomyolysis, encephalopathy, intellectual disability, seizures, and cardiac arrhythmias. We assess whether genotype and phenotype of TANGO2-related disorder has expanded since the initial discovery and determine the efficacy of exome sequencing (ES) as a diagnostic tool for detecting variants. METHODS:We present a series of 14 individuals from 11 unrelated families with complex medical and developmental histories, in whom ES or microarray identified compound heterozygous or homozygous variants in TANGO2. RESULTS:The initial presentation of patients with TANGO2-related disorders can be variable, including primarily neurological presentations. We expand the phenotype and genotype for TANGO2, highlighting the variability of the disorder. CONCLUSION:TANGO2-related disorders can have a more diverse clinical presentation than previously anticipated. We illustrate the utility of routine ES data reanalysis whereby discovery of novel disease genes can lead to a diagnosis in previously unsolved cases and the need for additional copy-number variation analysis when ES is performed.

SUBMITTER: Dines JN 

PROVIDER: S-EPMC6752277 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature

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TANGO2: expanding the clinical phenotype and spectrum of pathogenic variants.

Dines Jennifer N JN   Golden-Grant Katie K   LaCroix Amy A   Muir Alison M AM   Cintrón Dianne Laboy DL   McWalter Kirsty K   Cho Megan T MT   Sun Angela A   Merritt J Lawrence JL   Thies Jenny J   Niyazov Dmitriy D   Burton Barbara B   Kim Katherine K   Fleming Leah L   Westman Rachel R   Karachunski Peter P   Dalton Joline J   Basinger Alice A   Ficicioglu Can C   Helbig Ingo I   Pendziwiat Manuela M   Muhle Hiltrud H   Helbig Katherine L KL   Caliebe Almuth A   Santer René R   Becker Kolja K   Suchy Sharon S   Douglas Ganka G   Millan Francisca F   Begtrup Amber A   Monaghan Kristin G KG   Mefford Heather C HC  

Genetics in medicine : official journal of the American College of Medical Genetics 20180924 3


<h4>Purpose</h4>TANGO2-related disorders were first described in 2016 and prior to this publication, only 15 individuals with TANGO2-related disorder were described in the literature. Primary features include metabolic crisis with rhabdomyolysis, encephalopathy, intellectual disability, seizures, and cardiac arrhythmias. We assess whether genotype and phenotype of TANGO2-related disorder has expanded since the initial discovery and determine the efficacy of exome sequencing (ES) as a diagnostic  ...[more]

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