Journal
EUROPEAN JOURNAL OF MEDICAL GENETICS
Volume 62, Issue 9, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.ejmg.2018.09.011
Keywords
TOR1A; Biallelic mutations; Severe arthrogryposis; Reverse phenotyping
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Heterozygous mutations in TOR1A gene are known to be responsible for DYT1 dystonia with incomplete penetrance. Autosomal recessive TOR1A disease is a very recently described syndrome characterized by severe arthrogryposis, developmental delay, strabismus and tremor. A 2 month-old boy with severe arthrogryposis and developmental delay was referred to our department for genetic counseling. Dystonic movements were observed on physical examination. Whole exome sequencing revealed a homozygous nonsense variant in exon 5 of TOR1A (c.862C > T, p.Arg288*). Our results expand the phenotypic and mutational spectrum of biallelic TOR1A disease, while emphasizing the importance of reverse phenotyping in the diagnosis of rare genetic disorders.
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