Sulfotransferase 1C2 (SULT1C2) was quantified in 3 ES‐ADPKD samples out of 14, leading to significantly decreased expression compared with healthy controls and E‐ADPKD samples (P < 0.001 and P < 0.0001). This evidence concerns the gene SULT1C2 and autosomal dominant polycystic kidney disease.