Thomas Sullivan, M.D., FACS, FACRS

Mena Surgical Clinic
400 Crestwood Circle, Suite L

Board Certification: Specializes in general surgery and colon rectal surgery
Medical School: Autonomous University of Guadalajara, Guadalajara, Mexico
Residency: University of Illinois, Cook County Hospital Chicago, IL



What is Colorectal Cancer?

Colorectal Cancer is cancer that starts in the colon (large intestine) or the rectum. It is one of the most common cancers worldwide and screening is the most effective way to prevent it.


  • Colorectal Cancer usually develops from polyps-precancerous changes or growths in the lining of the colon or rectum.
  • A screening colonoscopy is done to check for cancer and inflammatory diseases like ulcerative colitis.
  • Getting screened for colorectal cancer can find and remove polyps before they turn into cancer. It can also find colorectal cancer at an early stage when it is most treatable.

If you are 50 or older, talk with your doctor about getting screened for colorectal cancer.