Although your medical examinations are not finished yet, white matter lesions in the brain direct us to a possible case of multiple sclerosis. Multiple sclerosisis an autoimmune disease where the immune system attacks its own structures (in this disease - the immune system attacks the myelin coverings of the nerve tracts in the brain). Lesions can appear any time, any place on the brain’s white matter (nerve tracts). Symptoms depend on the lesions’ localization. Symptoms become easier but do not disappear over timebecause lesions do repair, but not completely. Multiple sclerosis is a progressive disease because new lesions appear and the old ones don’t recover completely. A lumbar puncture is necessary for proper diagnosis because anty-myelin antibodies must first be detected in the spinal fluid. If multiple sclerosis is proved (and the antibodies are found), you would need therapy for slowing down the process( corticosteroids).