Kaplan-Meier Estimate Neoplasm Grading Neoplasm Metastasis Neoplasm Staging Odds Ratio Prognosis Publication Bias Urinary Bladder Neoplasms/*mortality/*pathology/therapy histological variants squamous differentiation urothelial carcinoma of the bladder including specific financial interests and relationships and affiliations relevant to the subject matter or materials discussed in the manuscript (eg employment/affiliation grants or funding consultancies honoraria stock ownership or options expert testimony royalties or patents filed received or pending) are the following: None.