AQP8 was found to be expressed at lower levels in clear cell renal cell carcinoma (fold change = −3.097), renal pelvis urothelial carcinoma (fold change = −2.198), and papillary renal cell carcinoma (fold change = −2.042) samples than in corresponding normal samples. Here, AQP8 is linked to renal pelvis urothelial carcinoma.