Had mri of brain due to persistent headaches caused by head trauma. impression mentioned mild periventricular gliosis. what does it mean?

Brain cell injury: It means you may need more tests 'gliosis: a process leading to scars in the central nervous system that involves the production of a dense fibrous network of neuroglia (supporting cells) in areas of damage. Gliosis is a prominent feature of many diseases of the central nervous system, including multiple sclerosis and stroke. After a stroke, neurons die and disappear with replacement gliosis.'.