Novel GLA T194A variant causes Fabry disease.

Fabry disease (FD) is an X-linked, systemic lysosomal deposition disease caused by alpha-galactosidase A (AGAL) enzyme deficiency deriving out of changes on the gene. Though several mutations have been described, one must consider that even a specific mutation may present with variable clinical expression within the same family. Typically described as a disease that affects hemizygous men with no residual AGAL activity, we describe a novel FD mutation (first case of T194A variant worldwide) in a 49-year-old woman presenting with a classic phenotype of FD. The patient investigation highlighted a previously not described mutation in exon 4 of the gene, as for the substitution of threonine for alanine. The same mutation was identified in her children, one of them presenting with end-stage kidney disease (ESKD) in early adulthood.