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Journal Article
Novel mutations in TSEN54 in pontocerebellar hypoplasia type 2.
Journal of Child Neurology 2014 April
Pontocerebellar hypoplasias represent a group of neurodegenerative autosomal recessive disorders characterized by hypoplasia/atrophy of the cerebellum, hypoplastic ventral pons, and microcephaly and associated with various clinical features. Pontocerebellar hypolasia type 2 is the most common form, and different mutations in genes encoding subunits of the transfer ribonucleic acid (RNA)-splicing endonuclease (TSEN) complex were identified in patients. The authors report clinical, imaging, and molecular studies in 2 unrelated patients with different clinical pictures of the pontocerebellar hypoplasia type 2 spectrum and novel mutations in TSEN54, aiming to further define the clinical spectrum of the disease and possible indicators of more favorable progression. They identified a novel missense mutation c.355T>G/p.Y119D in compound heterozygosity with the "common" c.919G>T/p.A307S (patient 1) and a novel homozygous c.7ins6(CCGGAG)/p.E2-P3insPE variant (patient 2). An expanded array of mutations might contribute in defining possible differences in severity and phenotype-genotype correlations.
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