ALG9 and autosomal dominant polycystic kidney disease: Recently, variants in additional genes (ALG9 encoding Alpha-1,2-mannosyltransferase ALG9, GANAB encoding glucosidase II subunit α (GIIα) and DNAJB11 encoding DnaJ heat shock protein family (Hsp40) member B11) have been described to cause a phenotype resembling ADPKD in smaller subsets of patients [33,34].