Tx, Tx \n Tis, Tis earliest stage (in situ) involves only mucosa \n T1, T1 through the muscularis mucosa \n T2, T2 through submucosa into muscularis propria \n T3, T3 through muscularis propria into outermost layers \n T4a, T4a through serosa/visceral peritoneum \n T4b, T4b through the wall attach/invade nearby tissues