i am 41 and diagnosed with a brain tumor years ago. Is new tongue and facial numbness a concern? Is it possible to have a tumor dormant this long and have deficits appear only every 5 years? It seems, to me,the deficits are spaced too far apart to mean anything critical, or even a tumor. My scans look horrible, but they have looked horrible for years. Most neurologists/surgeons look at scans and right away say, "Astrocytoma." The huge lesion is in the right hemisphere of my brain from frontal to occipital lobes. - -Numbness in entire left side since 2005. -Tongue veering and facial numbness, 2011 occurring just now. 1 grand mal, in 1998 but still lots of simple partial, motor seizures.