Somatotropic lower monoballism following hemorrhage in the subthalamic nucleus.

A 62-year-old man presented with monoballism of the right leg. Magnetic resonance images revealed a small hemorrhagic focus confined to the caudal portion of the left subthalamic nucleus. The monoballism disappeared after a short time, without treatment. This is the first report of lower monoballism with single subthalamic lesion. The findings in this case support the theory of somatotopic correspondence in the subthalamic nucleus.