My Ct scan showed Global parenchymal atrophy is present. No acute intracranial process. Periventricular white matter has normal attenuation. No soft tissue abnormalities are identified. What does this mean? I am a 27 year old, healthy female. I have a history of anxiety and thyroid disease. That's it. No family history of any major illnesses. I am a little concerned about the Global Parenchymal atrophy.