We could not identify the genetic mutation of P1 in the exons of PKD1/PKD2, but intronic mutations 8161 + 38G > A and 2986-15C > T were found in P1, which are described in ADPKD Mutation Database [PKDB] (http://pkdb.mayo.edu/.mutation). This evidence concerns the gene PKD2 and autosomal dominant polycystic kidney disease.