Can you tell me what is tiny lacunar infarct of left basal ganglia?

Small Stroke.: Those findings are small strokes of specific areas of the brain that are subcortical or below the cortex. Two of the three mechanisms for those strokes are related to a chronic vascular disease associated with hypertension. Other likely risk factors include diabetes mellitus and possibly smoking. Symptoms will depend on what was affected. See your Neurologist or PCP. Not a 'classic stroke'.