investigated 80 children using only sonographic criteria at the first postnatal examination, including those with a renal phenotype, such as unilateral multicystic dysplasia, uni- or bilateral cystic kidneys, uni- or bilateral renal hypo/dysplasia, and single kidney, and found HNF1B variations in 25 patients (31.2%) ( 19 ). Here, HNF1B is linked to Renal cyst.