Primary hyperoxaluria is a group of inherited diseases with autosomal recessive inheritance (ARD), resulting from an inborn disorder of hepatic glyoxylate metabolism responsible for excessive oxalate production and increased urinary oxalate excretion.This disorder leads to precipitation of highly insoluble oxalate in the form of calcium oxalate crystals in the kidneys, resulting in nephrocalcinosis, recurrent urinary lithiasis (LU) and frequent progression...