CDH1 and renal pelvis/ureter urothelial carcinoma: Although decreased expression of E-cadherin is correlated with poor prognosis in patients with UTUC, many studies on E-cadherin have not yet been conducted.[20–23] However, the prognostic value of E-cadherin has not been clearly established in patients with UTUC because UTUC is a relatively rare disease and contradictory conclusions have been reported in previous papers.