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Self-Assessment Questions

Family Medicine

Colorectal Cancer: Review Questions

Paul F. Roberts, MD

Dr. Roberts is an Instructor of Family Medicine and Consultant, Mayo Clinic, Jacksonville, FL.



Choose the single best answer for each question.

1. Which of the following statements regarding the epidemiology of colorectal cancer is true?
  1. Colorectal cancer is the leading cause of cancer deaths overall
  2. Colorectal cancer is the second leading cause of cancer deaths overall
  3. Colorectal cancer is the third leading cause of cancer deaths overall
  4. Screening for colorectal cancer does not reduce the cancer-related mortality
  5. The death rate from colorectal cancer has increased over the last 10 years
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2. A 70-year-old man undergoes a colonoscopy because of intermittent rectal bleeding caused by internal hemorrhoids. The colonoscopy reveals a polyp that is removed. The polyp has the highest risk for malignancy if it is which of the following types?

  1. Hyperplastic polyp
  2. Juvenile polyp
  3. Tubular adenomatous polyp
  4. Villous adenomatous polyp
  5. Tubulovillous adenomatous polyp
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3. Which of the following screening methods is most appropriate in screening for colorectal cancer?
  1. Colonoscopy every 10 years
  2. Double-contrast barium enema every 2 years
  3. Fecal occult blood testing every 3 years
  4. Flexible sigmoidoscopy every 7 years
  5. Virtual colonoscopy every 5 years
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4. A 75-year-old woman sees her physician because of bowel changes, hematochezia, and a 9.1-kg (20-lb) weight loss over the past 2 months. Physical examination reveals a pale, elderly woman with positive results on fecal occult blood testing. She undergoes a work-up, including colonoscopy, and is found to have colon cancer with metastasis to the liver. Which of the following stages of the Dukes classification best describes her cancer?

  1. Dukes stage A
  2. Dukes stage B
  3. Dukes stage C1
  4. Dukes stage C2
  5. Dukes stage D
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