Pernicious anemia can lead to dementia-like symptoms and is a treatable cause of dementia if diagnosed and treated with B12 injections.

“this is actually one of the treatable forms of dementia that we know of the Cardinal symptoms are look like dementia — and the only way to help these people is if some astute Healthcare clinician measures a B12 level identifies and recognizes the problem and then does further testing for pernicious anemia this autoimmune form of B12 deficiency and then you correct it and the treatment is vitamin B12 injections taking a pill won't work because you can't absorb it so you've just got to inject people with vitamin B12 and it can restore everything for most people”