What stage does a bladder tumor of 2 centimeters reach? The size of the bladder tumor is not the criterion for determining the stage of the tumor, but mainly the depth of invasion. If it invades the mucosal layer and submucosal layer, it is stage 1. If it invades into the muscular layer, it is stage T2, superficial muscular layer is T2A, invasion into the deep muscular layer is T2B, and invasion into the tissues around the bladder is T3. T3A is the invasion of the tumor into the tissues around the bladder seen under the microscope, and T3B is the tumor mass of the bladder cancer seen with the naked eye. t4 is the invasion of the tumor into the prostate gland, the uterus, the vagina, the pelvic wall, and the abdominal wall. t4a is the invasion into the prostate gland, and in females, the invasion into the uterus or the vagina. invading into the uterus or vagina.T4B is mainly tumor invasion into the pelvic or abdominal wall.