TORONTO - Former UFC heavyweight champion Brock Lesnar says putting his faith in doctors at a Manitoba hospital almost killed him.

In his autobiography "Death Clutch," scheduled for release on May 28, the mixed martial arts star describes his painful stay at a Brandon hospital in late 2009 after falling ill on a wilderness holiday in western Manitoba.

The six-foot-three, 265-pound fighter was so sick, he had to be carried to the car by his brother.

Lesnar says he suffered because the hospital's lone CT machine was broken, meaning doctors were unable to find out what was causing his stomach pain.

"I had no clue what was wrong, since they couldn't get a picture of my stomach," Lesnar writes. "The doctor didn't know either. He was waiting on the part for the machine. Time was slipping away, and I was wondering if I would ever make it out of that hospital alive.

"I put my faith in the doctors at that hospital. I shouldn't have. It almost cost me my career. It almost cost me my life."