C19orf12 and neurodegeneration with brain iron accumulation: Four years later, exome sequencing revealed a homozygous missense variant in (c.187G > C; p.Ala63Pro) in C19orf12, a gene implicated in neurodegeneration with brain iron accumulation (NBIA) [84], and identified as the cause of a distinct clinical subtype of neurodegeneration with brain iron accumulation two years previously [85].