William Utermohlen was a successful American artist living in London. In 1995, at the age of 61, he received a devastating diagnosis. He had Alzheimer's disease, a neurodegenerative disorder with no known cure. 
Following his diagnosis, Utermohlen began painting self portraits. He kept up the series throughout the disease's progression, right up until he was admitted into a nursing home in 2000. His paintings show a heart-wrenching portrayal of what it is like to live with Alzheimer's. 

A self-portrait of William Utermohlen from 1967.

1996

1996

1997

1997

1998

1999

2000

All of the portraits together.

Here are some of Utermohlen’s other paintings before his diagnosis:

William Utermohlen passed away in 2007 at the age of 73.
Source : www.wimp.com