Do you know anyone who has had cancer?  
Yes, my uncle :( Cancer is abnormal cell grown and it can spread.
My mother had breast cancer and it was very aggressive.
Cancer
Cancer is a group of diseases involving abnormal cell growth with the potential to invade or spread to other parts of the body. These contrast with benign tumors, which do not spread. Possible signs and symptoms include a lump, abnormal bleeding, prolonged cough, unexplained weight loss, and a change in bowel movements. While these symptoms may indicate cancer, they can also have other causes. Over 100 types of cancers affect humans.
Tobacco use is the cause of about 22% of cancer deaths. Another 10
In 1998, Ellsworth was diagnosed with a very aggressive form of nose cancer and underwent immediate surgery. It was caught before it spread.
Ellsworth suffered a focal seizure in Germany in June 2002, right in the middle of the song "Necroshine". Ellsworth commented, "The beauty of a stroke is that you don’t remember. I don’t know what it changed, because I forget how it used to be (laughs). Occasionally I piss my pants when somebody turns a microwave on (laughs).