The tumor, node, metastasis classification is used in the staging of bladder cancer. Although it is not yet included in current urology guidelines, the prognostic significance of the T1 substaging has been suggested in many studies. The grading of bladder cancer uses the World Health Organization’s 1973 and 2004/2022 classifications, new classifications formed by their combination are currently favored. Carcinoma in situ and lymphovascular invasion are important entities in recurrence and progression. According to the WHO guidelines, urothelial carcinoma’s morphological diversity is classified into 10 subtypes, and it is suggested to report the ratio of divergent differentiation and/or histological variants.