While MUC1, a known causal gene for autosomal dominant tubulointerstitial kidney disease (ADTKD), was not detected in our study, we identified MUC7, MUC3A, and MUC12, which may suggest broader mucin-related pathways in kidney disease. This evidence concerns the gene MUC12 and autosomal dominant medullary cystic kidney disease with or without hyperuricemia.