Uncle Frank from Jimmy Kimmel Cause of Death?

So I heard Uncle Frank from the Jimmy Kimmel live show died. What was his cause of death?
I was surprised when I heard he died, I knew he was sick and his health was not so good. How did he die?
What illness did Uncle Frank have? Is it true that Jimmy Kimmel made a special tribute on his show to remember Uncle Frank?
Please let me know about his cause of death and point me to the video of Uncle Frank's tribute on Jimmy Kimmel.

Uncle Frank's official cause of death was cancer, he's been battling for some time now.
Hi real name was Frank Potenza and he was a onetime New York City policeman who became very popular when Jimmy Kimmel called him to be in the show.
Uncle Frank served as a police officer for 20 years, he also worked as a guard in Las Vegas and at St. Patrick's Cathedral in Manhattan.
Uncle Frank served in the military during the Korean War and had three daughters. He was a great guy.
When Jimmy Kimmel announced his death live, he barely could talk after he started to cry.