43 y/o female, Difficulty walking for two years, when I stand my legs feel like I just finished a marathon. Blood tests normal. I am now having some daily occurrences of incontinence, just can't stop myself from going. MRI lumbar, thoracic showed no probs. EMG test on lower legs showed mild nerve damage only, not enough to cause my problems. Next step is MRI Brain, which is more likely, brain tumor, MS, or water on the brain.