Isik E, Aykut A, Atik T, Cogulu O, Ozkinay F. Biallelic TOR1A mutations cause
severe arthrogryposis: A case requiring reverse phenotyping.
Eur J Med Genet 2018;
62:103544. [PMID:
30244176 DOI:
10.1016/j.ejmg.2018.09.011]
[Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2018] [Revised: 09/11/2018] [Accepted: 09/18/2018] [Indexed: 12/22/2022]
Abstract
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.
Collapse