Muscle weakness
There is an area of the brain called precentral gyrus at the frontal lobe. When a tumor affects this area, it is very common to experience muscle weakness or paralysis on a certain part of the body. There are many reasons for muscle paralysis, and some of them can be treated. It is a disturbing sign that should be assessed by your doctor. As the tumor expands, the affected area with muscle weakness or paralysis will be expanded as well.