PuSH - Publikationsserver des Helmholtz Zentrums München: <em>C19orf12</em> mutations in neurodegeneration with brain iron accumulation mimicking juvenile amyotrophic lateral sclerosis

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Deschauer, M.* ; Gaul, C.* ; Behrmann, C.* ; Prokisch, H. ; Zierz, S.* ; Haack, T.B.

C19orf12 mutations in neurodegeneration with brain iron accumulation mimicking juvenile amyotrophic lateral sclerosis

J. Neurol. 259, 2434-2439 (2012)

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Open Access Green möglich sobald Postprint bei der ZB eingereicht worden ist.

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Mutations in C19orf12 have been recently identified as the molecular genetic cause of a subtype of neurodegeneration with brain iron accumulation (NBIA). Given the mitochondrial localization of the gene product the new NBIA subtype was designated mitochondrial membrane protein-associated neurodegeneration. Frequent features in the patients described so far included extrapyramidal signs and pyramidal tract involvement. Here, we report three C19orf12-mutant patients from two families presenting with predominant upper and lower motor neuron dysfunction mimicking amyotrophic lateral sclerosis with juvenile onset. While extrapyramidal signs were absent, all patients showed neuropsychological abnormalities with disinhibited or impulsive behavior. Optic atrophy was present in the simplex case. T2-weighted cranial MRI showed hypointensities suggestive of iron accumulation in the globi pallidi and the midbrain in all patients. Sequence analysis of C19orf12 revealed a novel mutation, p.Gly66del, compound heterozygous with known mutations in all patients. These patients highlight that C19orf12 defects should be considered as a differential diagnosis in patients with juvenile onset motor neuron diseases. Patients have to be examined carefully for neuropsychological abnormalities, optic neuropathy, and signs of brain iron accumulation in MRI.

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