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Question 33

Colorectal cancer screening begins at age 50. Many patients are reluctant to undergo colonoscopy. Which of the following is not an appropriate alternative to colonoscopy for colorectal cancer screening?

Answer Choices:

Guaiac-based fecal occult blood test every 1-2 years

CT colongraphy every 5 years

Rectal exam every year

Fecal immunochemical test every 1-2 years

Flexible sigmoidoscopy every 5 years

Correct Answer:

Rectal exam every year


  • Colorectal cancer is most common among adults over the age of 50.

  • Screening options between age 50 and 75 include guaiac-based fecal occult blood test, fecal immunochemical test or multitargeted stool DNA test every 1-2 years, flexible sigmoidoscopy or CT colongraphy every 5 years or colonoscopy every 10 years.

  • Black women and those with a family history of colorectal cancer have increased risks and may consider screening at earlier ages.