Elderly WA woman with dementia missing

An 85 year-old woman with dementia has gone missing after leaving a family member's house in Perth's south east.

Police said Joyce Purcell, who is described as fair skinned with grey hair, left a house in Kelmscott to travel to her home in Wilson and was last seen driving a gold 2005 Mazda 3 with a registration number 1CCD834.

Ms Wilson suffers from dementia and can become easily disorientated or lost, with police saying she was last seen wearing black pants, a black skivvy top, a red cardigan with black triangle patterns and red shoes.