What Does This CT Scan Of Brain Indicate?

Hi, My mother had CT Scan of Brain last week have got report. could you pls help us to understand what excatly it is. Small well defined hypo density of low atteauation is seen in left rental region s/o cronic saract rest of the brain tarenchyma deticts normal attenqation value verticular system crotical sulti & cisternal spaces L prominent no shift to mid line chracter is seen hypo density of low attention in left rental region cronic infect difuse cerevral attrophic changes