Gallbladder cancer can be diagnosed using ultrasound. On ultrasound, this type of gallbladder cancer can generally be divided into three types. One type is the thick-walled gallbladder cancer, which appears as uneven thickening of the gallbladder wall, resembling thick, non-elastic leather. The second type is the mass-forming type, which is relatively easier to diagnose. It appears as a solid mass taking over the entire gallbladder, often invading the nearby liver, and the normal shape of the gallbladder has disappeared. The third type is the intraluminal type, where on ultrasound, you can see the tumor attached to the gallbladder wall, which is relatively wider and larger.