Colorectal cancer is the 3rd most common cancer in both men and women. Which of the following statements is incorrect about colorectal cancer?

• A. Smoking and alcohol use increase the risk of colorectal cancer. 
• B. Colorectal cancer can be diagnosed using stool tests and colonoscopy. 
• C. Colorectal cancer is treated with a combination of surgery, radiation, and chemotherapy. 
• D. Having colon polyps does not increase the risk of colorectal cancer. 

Answer: (D)

Verified step by step guidance

1. Step 1: Understand the context of colorectal cancer. It is the third most common cancer in both men and women, and understanding its risk factors, diagnostic methods, and treatments is crucial for identifying incorrect statements.
2. Step 2: Analyze the first statement: 'Smoking and alcohol use increase the risk of colorectal cancer.' This is correct because both smoking and excessive alcohol consumption are well-documented risk factors for colorectal cancer.
3. Step 3: Analyze the second statement: 'Colorectal cancer can be diagnosed using stool tests and colonoscopy.' This is also correct, as stool tests (e.g., fecal occult blood test) and colonoscopy are standard diagnostic tools for detecting colorectal cancer.
4. Step 4: Analyze the third statement: 'Colorectal cancer is treated with a combination of surgery, radiation, and chemotherapy.' This is correct as well, as these are common treatment modalities depending on the stage and severity of the cancer.
5. Step 5: Analyze the fourth statement: 'Having colon polyps does not increase the risk of colorectal cancer.' This is incorrect because colon polyps, especially adenomatous polyps, are a known risk factor for developing colorectal cancer. Therefore, this statement is the incorrect one.