Primary hyperoxaluria type 1 (PH1) is a rare, autosomal recessive disease characterized by hepatic overproduction of oxalate due to a deficiency in the peroxisomal enzyme alanine–glyoxylate aminotransferase (AGT), which is encoded by the AGXT gene [1, 2]. This evidence concerns the gene AGXT and primary hyperoxaluria type 1.