Generally, the brain is affected symmetrically with excess copper deposition, although symptoms can be worse on one side of the body than another. This may have to do with factors of asymmetric neurologic development, such as being right or left-handed. The copper is often seen most prominently in the basal ganglia, the area deep within the brain that coordinates movements. The face of the giant panda sign refers to a characteristic appearance of the basal ganglia in advanced Wilson's disease. This is a description of the appearance of the basal ganglia wherein one can get an impressionists image of the face of a giant panda. Fred Askari, M.D., Ph.D. Assistant Professor Director, Wilson's Disease Center of Excellence Clinic at the University of Michigan