Which of the following colonic polyps has no risk for malignancy –
## **Core Concept**
The question tests knowledge of colonic polyps and their potential for malignancy. Colonic polyps are growths on the inner lining of the colon or rectum and can be classified into different types, including adenomatous, hyperplastic, and hamartomatous polyps. The risk of malignancy varies among these types.
## **Why the Correct Answer is Right**
The correct answer, **D.**, refers to a type of polyp that is known to have little to no risk of developing into colorectal cancer. **Hyperplastic polyps** are generally considered to have no significant risk of malignancy. They are usually small, found in the distal colon and rectum, and are often considered to be non-neoplastic.
## **Why Each Wrong Option is Incorrect**
- **Option A:** Adenomatous polyps (also known as adenomas) are precancerous growths that can develop into colorectal cancer over time. They are a common type of polyp and have a recognized risk of malignancy.
- **Option B:** Tubulovillous adenomas are a subtype of adenomatous polyps and also carry a risk of malignancy, potentially more so than tubular adenomas due to their villous component.
- **Option C:** Familial adenomatous polyposis (FAP) polyps are adenomatous polyps that occur in the context of FAP, a genetic disorder characterized by the development of hundreds to thousands of polyps in the colon and rectum. These polyps have a nearly 100% risk of developing into colorectal cancer if left untreated.
## **Clinical Pearl / High-Yield Fact**
A key point to remember is that **hyperplastic polyps** are typically considered to have no malignant potential, whereas adenomatous polyps (including tubular, villous, and tubulovillous adenomas) do have a risk of malignancy. The identification and removal of polyps with malignant potential are crucial in the prevention of colorectal cancer.
## **Correct Answer:** D. Hyperplastic polyps