All the following polyps are premalignant except:March 2011
**Core Concept**
Hyperplastic polyps are generally considered to be non-neoplastic and non-premalignant lesions of the colon. In contrast, other types of polyps are recognized for their potential to develop into colorectal cancer over time.
**Why the Correct Answer is Right**
Hyperplastic polyps are characterized by their glandular structure and are often found in the rectosigmoid region. Unlike adenomatous polyps, they do not exhibit the characteristic nuclear abnormalities or architectural disorganization that increase their risk of progressing to cancer. The risk of hyperplastic polyps transforming into colorectal cancer is extremely low, making them distinct from other premalignant polyp types.
**Why Each Wrong Option is Incorrect**
**Option A:** Juvenile polyposis syndrome is a rare genetic disorder that increases the risk of developing colorectal cancer. The presence of multiple juvenile polyps in the colon is a premalignant condition that requires close surveillance and potential surgical intervention.
**Option B:** Familial polyposis syndrome, also known as familial adenomatous polyposis (FAP), is a hereditary condition characterized by the development of hundreds to thousands of adenomatous polyps in the colon. If left untreated, FAP has a nearly 100% risk of progressing to colorectal cancer.
**Option D:** Peutz-Jeghers syndrome is a rare genetic disorder characterized by the development of hamartomatous polyps throughout the gastrointestinal tract, as well as an increased risk of various cancers, including colorectal cancer. The presence of Peutz-Jeghers polyps is a premalignant condition that requires ongoing surveillance.
**Clinical Pearl / High-Yield Fact**
When evaluating a patient with a polyp, it is essential to consider not only the type of polyp but also the patient's overall clinical context, including their family history and genetic predisposition.
**β Correct Answer: C. Hyperplastic polyps**