Many PD patients have dementia with lewy body
 

http://www.medicalnewstoday.com/articles/123254.php

Devising A Plan To Cope With Lewy Body Dementia - MayoClinic.com
28 Sep 2008

Lewy body dementia is a progressive brain disease and the second leading cause of degenerative dementia in the elderly. Dementia with Lewy bodies (DLB), which is the clinical name, accounts for up to 20 percent of all dementia cases, or 800,000 patients in the United States.

Lewy body dementia shares characteristics with Alzheimer's and Parkinson's diseases. Like Alzheimer's, it causes confusion. Also present may be the distinctive physical signs typical of Parkinson's-- rigid muscles, slowed movement and tremors.

MayoClinic.com informs caregivers how to develop a plan to cope with Lewy body dementia. Caring for a person with this condition can be all-absorbing. MayoClinic.com suggests that a care plan should include these steps:

dedication for the post...
 

the family of one of my good friends w/ young onset PD, received
the autopsy of her brain, & and they remarked - dementia/with lewy body.