HNF1B and medullary sponge kidney: Lastly, other types of non-hereditary and hereditary CyKD, which are not included in this study, are complex renal cyst, cystic renal tumor, obstructive cystic dysplasia, medullary sponge kidney, glomerulocystic kidney disease (GCKD) HNF1B/TCF2-associated disease, and Von Hippel–Lindau syndrome [42].