MUC1 and autosomal dominant medullary cystic kidney disease with or without hyperuricemia: In contrast to simple tandem repeats commonly seen in (coding and noncoding) repeat expansion diseases (e.g. Huntington Disease or Fragile X Syndrome etc.)the actual size of the coding 60 basepair VNTR in ADTKD-MUC1 seems irrelevant to the pathomechanism of ADTKD (Fig. 1)5,10,11.