Definite cognitive function deficits of insidious onset over the last 2 years and ADL impairments in keeping with Dementia syndrome. In 63 yr old Bipolar patient on Lithium for about 11yrs. CT scan showed small cerebral vessel disease. The other cardiovascular risk factors is Hypertension. Cognitive symptoms are not fluctuating and the progression is steady. Am unable to make a definite call of what subtype of Dementia this could be.