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TUBB4A de novo mutations cause isolated hypomyelination.

ABSTRACT: OBJECTIVE: We present a series of unrelated patients with isolated hypomyelination, with or without mild cerebellar atrophy, and de novo TUBB4A mutations. METHODS: Patients in 2 large institutional review board-approved leukodystrophy bioregistries at Children's National Medical Center and Montreal Children's Hospital with similar MRI features had whole-exome sequencing performed. MRIs and clinical information were reviewed. RESULTS: Five patients who presented with hypomyelination without the classic basal ganglia abnormalities were found to have novel TUBB4A mutations through whole-exome sequencing. Clinical and imaging characteristics were reviewed suggesting a spectrum of clinical manifestations. CONCLUSION: Hypomyelinating leukodystrophies remain a diagnostic challenge with a large percentage of unresolved cases. This finding expands the phenotype of TUBB4A-related hypomyelinating conditions beyond hypomyelination with atrophy of the basal ganglia and cerebellum. TUBB4A mutation screening should be considered in cases of isolated hypomyelination or hypomyelination with nonspecific cerebellar atrophy.

SUBMITTER: Pizzino A

PROVIDER: S-EPMC4153852 | biostudies-literature | 2014 Sep

REPOSITORIES: biostudies-literature

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TUBB4A de novo mutations cause isolated hypomyelination.

Pizzino Amy A Pierson Tyler Mark TM Guo Yiran Y Helman Guy G Fortini Sebastian S Guerrero Kether K Saitta Sulagna S Murphy Jennifer Louise Patrick JL Padiath Quasar Q Xie Yi Y Hakonarson Hakon H Xu Xun X Funari Tara T Fox Michelle M Taft Ryan J RJ van der Knaap Marjo S MS Bernard Geneviève G Schiffmann Raphael R Simons Cas C Vanderver Adeline A

Neurology 20140801 10

<h4>Objective</h4>We present a series of unrelated patients with isolated hypomyelination, with or without mild cerebellar atrophy, and de novo TUBB4A mutations.<h4>Methods</h4>Patients in 2 large institutional review board-approved leukodystrophy bioregistries at Children's National Medical Center and Montreal Children's Hospital with similar MRI features had whole-exome sequencing performed. MRIs and clinical information were reviewed.<h4>Results</h4>Five patients who presented with hypomyelin ...[more]

PMID: 25085639

Dataset Information

TUBB4A de novo mutations cause isolated hypomyelination.

Publications

TUBB4A de novo mutations cause isolated hypomyelination.

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