Less than two years after beating ovarian cancer for the second time, MTV's "The Challenge" star Diem Brown is facing yet another devastating hurdle -- the 32-year-old has been diagnosed with colon cancer. Brown collapsed, then underwent emergency surgery in New York City last Sunday (August 17).

"Doctors found one tumor blocking her colon completely so they had to do emergency surgery that evening to remove the blockage," Brown's sister Megan told People. "They were able to remove the mass, but once they were inside they found out there were multiple tumors."

Brown then underwent a second emergency surgery after the first caused an infection in her abdomen, and is currently resting at the hospital in stable condition. Her family says she is expected to start another round of chemotherapy within the next few weeks.

"She's in and out," Megan continued. "She's on a lot of medication but every once and awhile you'll see her spirit, the light back in her eyes."

Brown made her television debut on MTV's "Real World/Road Rules Challenge: Fresh Meat" in 2006. She received her first ovarian cancer diagnosis at the age of 23, then later went on to complete in "The Duel," where she famously showed bravery by taking off her wig in front of the cameras. She's since become a "Challenge" favorite, and she recently competed in "Rivals II" only weeks after going through chemo for the second time.

In addition to her onscreen work, Brown is passionate about her fundraising site, MedGift, which helps sick patients with their medical bills. A page has been created by her family, and you can donate here.