Fawcett was diagnosed with anal cancer in 2006. In 2007 she announced at a press conference that she was cancer free. The cancer returned shortly after the conference.
Earlier this year she flew to Germany for stem-cell treatment.
Sources told RadarOnline.com that she was unconscious and that been in hospital since Thursday.
The New York Daily News reports;
“In the face of excruciating pain and uncertainly, I never lost hope and it never occurred to me to stop fighting – not ever,” she said in a statement to fans.
Anal cancer is rare. Symptoms include bleeding, pain or lumps in the anal area.