Thompson Cancer Survival Center
Colorectal Cancer

Screening and Diagnosis

  • Fecal Occult Blood Test
    A microscopic examination of feces is checked for blood.

  • Digital Rectal Exam
    A physical examination of the inside of the rectum to feel for lumps or any unusual masses.

  • Barium Enema
    A series of X-rays of the lower gastrointestinal tract taken after barium is put into the rectum to coat the gastrointestinal tract.

  • Sigmoidoscopy
    An examination of the rectum and lower colon with a lighted fiber-optic tube inserted through the anus. In addition to looking for polyps, abnormal areas or cancer, the sigmoidoscope can often take samples of suspicious areas for biopsy.

  • Colonoscopy
    An examination of the rectum and entire colon with a flexible lighted fiber-optic tube inserted through the anus. The colonoscope's is long enough to examine the entire colon. Like a sigmoidoscope, a colonoscope can take samples of suspicious areas for biopsy In addition to looking for polyps, abnormal areas or cancer.

  • Virtual Colonoscopy
    Virtual colonoscopy (or colonography) uses computed tomography to assemble a series of X-rays into a highly-detailed image of the inside of the colon. Any polyps and other unusual masses can be seen on the CT images.

  • Genetic Counseling
    Thompson's genetics clinic identifies individuals who are likely to have a hereditary predisposition to colon and/or uterine cancer. Individuals who are identified as at risk are offered additional counseling on the genetics of hereditary cancer, genetic testing options and risk reduction. Indications for a colon/uterine cancer genetics evaluation include:

    • Individuals who have had colon or uterine cancer prior to age 50.
    • Individuals who have had two separate colon cancers or both colon and uterine cancer at any age.
    • Individuals who have two close relatives with colon and/or uterine cancer at any age.
    • Individuals who have been diagnosed with polyposis ( > 10 polyps found in the colon) or close relatives of an individual diagnosed with polyposis.