Early-Onset Mild Type Leukoencephalopathy Caused by a Homozygous EARS2 Mutation

Childhood leukoencephalopathies are a broad class of diseases, which are extremely rare. The treatment and classification of these disorders are both challenging. Nearly half of children presenting with a leukoencephalopathy remain without a specific diagnosis. Leukoencephalopathy with thalamus and brain stem involvement and high lactate (LTBL) is a newly described childhood leukoencephalopathy caused by mutations in the gene encoding a mitochondrial aminoacyl-tRNA synthetase specific for glutamate, EARS2. Magnetic resonance images show a characteristic leukoencephalopathy with thalamic and brain stem involvement. Here, we report a different clinical course of LTBL supported by typical MRI features in a Turkish patient who presented with a history of failure to walk. The EARS2 gene mutation analysis identified a c.322C>T transition, predicting a p.R108W change. This is the first reported early-onset mild type LTBL caused by a homozygous EARS2 mutation case in the literature.

Source: Journal of Child Neurology - May 10, 2016 Category: Neurology Authors: Taskin, B. D., Karalok, Z. S., Gurkas, E., Aydin, K., Aydogmus, U., Ceylaner, S., Karaer, K., Yilmaz, C., Pearl, P. L. Tags: Other Source Type: research