What Does Extensive Nonspecific T2/flair Signal Hyperintensity Mean?

I have an MRI Brain WO Contrast report. The comments state not normal needs to see neurology followed by the narrative and impression. Taking from the impression - extensive nonspecific T2/flair signal hyperintensity within the periventricular and subcortical white matter . My question - is this basically stating I have alzheimers(sp?)?