novel deletion mutation of exon 2 of the C19orf12 gene in an Omani family with mitochondrial membrane protein-associated neurodegeneration [MPAN]

Mutations in the C19 or f12 gene are known to cause mitochondrial membrane protein associated neurodegeneration [MPAN], which is a neurodegeneration with brain iron accumulation [NBIA] type 4 disorder. To the best of our knowledge, this is the first report of a genetically confirmed case of MPAN from Oman. A novel homozygous deletion of exon 2 of the C19 or f12 gene was confirmed on the proband, a seven-year old girl, who presented with gait instability. Brain magnetic resonance imaging showed iron deposition on the basal ganglia. This report highlights the importance of genetic testing of such a clinically and genetically heterogeneous condition among a population with a high consanguinity rate. To overcome the diagnostic difficulty, implementation of a cost-effective approach to perform cascade screening of carriers at risk is needed as well as programs to address risky consanguineous marriages

Late onset central hypoventilation syndrome due to a heterozygous polyalanine repeat expansion mutation in the PHOX2B gene

This report describes a 6 year old girl with late onset central hypoventilation syndrome due to a heterozygous polyalanine repeat expansion mutation in the PHOX2B gene. This report aims to increase the awareness of this condition among physicians to allow earlier clinical and genetic diagnosis and management of cases of unexplained hypoventilation