Tumors are divided into two main categories: benign tumors and malignant tumors. The malignant tumors that occur in epithelial tissues are called cancers, such as lung cancer, bladder cancer, and breast cancer. Therefore, bladder cancer is malignant; there are no benign bladder cancers. Cancer, in contrast to benign tumors, tends to metastasize to distant locations, grow rapidly, and can spread through blood, lymph nodes, and local invasion. Thus, it is termed as cancer and is malignant, which means there is no such thing as benign bladder cancer.