AQP7 and renal pelvis urothelial carcinoma: AQP7 was expressed at lower levels in clear cell renal cell carcinoma (fold change = −9.610, Gumz Renal, −2.102, Lenburg Renal), renal oncocytoma (fold change = −2.692), and renal pelvis urothelial carcinoma (fold change = −1.741) samples than in normal samples.