UMOD, encoding uromodulin [3]; MUC1, encoding the glycoprotein mucin 1 [4]; HNF1B, encoding the transcription factor hepatocyte nuclear factor 1β [5]; REN, encoding preprorenin, the precursor of renin [6]; and SEC61A1, encoding the alpha1 subunit of the SEC61 complex [7] have been identified as causative genes for ADTKD. The gene discussed is REN; the disease is autosomal dominant medullary cystic kidney disease with or without hyperuricemia.