The following is from Fox News:

UFC heavyweight champion Brock Lesnar said his road to wellness included multiple misdiagnoses, substandard medical care and a frantic car ride across the Canadian border.

Lesnar, who has battled through a painful intestinal infection called diverticulosis for the last few months, related his story during a Wednesday conference call.

“I didn’t know what was going on at first,” Lesnar said. “I was very sick. I’ve been suffering almost a year with something I didn’t know what it was. I had some stomach pains here and there and some flu-like symptoms throughout the year. Actually, during the training camp for Shane Carwin is when everything just kind of snowballed. That’s when I realized I was missing full weeks of my training camp because I just couldn’t perform. That’s when I decided four weeks out to give these guys (the UFC) hopefully enough notice.”

Lesnar said the last thing he wanted to do was give a “bad performance” or “risk losing my title,” so he withdrew from a Nov. 21 contest against Carwin at UFC 106. The promotion tentatively rescheduled the bout for UFC 108 on Jan. 2 in Las Vegas, while the 32-year-old fighter kept returning to the doctor to pinpoint what was wrong with him.

Lesnar said physicians gave a couple of potential diagnoses, including mononucleosis and the H1N1 virus. Lesnar acknowledged that he refused to get a CT scan, which might have allowed doctors to diagnose him properly at the time.

“In my mind, I either had the flu or mono, and so I had to pull the pin and decided to take a little vacation and get away from the chaos and head up to Canada and do some hunting,” Lesnar said.