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De novo pathogenic variant in TUBB2A presenting with arthrogryposis multiplex congenita, brain abnormalities, and severe developmental delay
Author(s) -
Ejaz Resham,
Lionel Anath C.,
Blaser Susan,
Walker Susan,
Scherer Stephen W.,
BabulHirji Riyana,
Marshall Christian R.,
Stavropoulos Dimitri J.,
Chitayat David
Publication year - 2017
Publication title -
american journal of medical genetics part a
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.064
H-Index - 112
eISSN - 1552-4833
pISSN - 1552-4825
DOI - 10.1002/ajmg.a.38352
Subject(s) - arthrogryposis multiplex congenita , phenotype , arthrogryposis , optic nerve hypoplasia , genetics , biology , gene , global developmental delay , dysplasia
Disorders of brain formation can occur from pathogenic variants in various alpha and beta tubulin genes. Heterozygous pathogenic variants in the beta tubulin isotype A gene, TUBB2A , have been recently implicated in brain malformations, seizures, and developmental delay. Limited information is known regarding the phenotypic spectrum associated with pathogenic variants in this gene given the rarity of the condition. We report the sixth individual with a de novo heterozygous TUBB2A pathogenic variant, who presented with a severe neurological phenotype along with unique features of arthrogryposis multiplex congenita, optic nerve hypoplasia, dysmorphic facial features, and vocal cord paralysis, thereby expanding the gene‐related phenotype.