Ulcerative colitis progressing to malignancy is characterized by following except –
**Core Concept**
Ulcerative colitis (UC) is a type of inflammatory bowel disease (IBD) that increases the risk of colorectal cancer. The progression to malignancy is a well-known complication of long-standing UC. The risk is highest in patients with extensive colitis, especially those with a history of primary sclerosing cholangitis (PSC).
**Why the Correct Answer is Right**
The progression of UC to malignancy is thought to occur due to chronic inflammation, genetic mutations, and epigenetic changes in the colonic mucosa. The risk is increased by factors such as extensive colitis, family history of colorectal cancer, and the presence of PSC. The development of dysplasia is a critical step in the carcinogenic process, which can be detected by colonoscopy and biopsy.
**Why Each Wrong Option is Incorrect**
* **Option A:** Not applicable (missing option).
* **Option B:** Not applicable (missing option).
* **Option C:** Not applicable (missing option).
* **Option D:** Not applicable (missing option).
**Clinical Pearl / High-Yield Fact**
A key risk factor for colorectal cancer in UC patients is the presence of primary sclerosing cholangitis (PSC). This association is so strong that the presence of PSC should prompt a more aggressive surveillance strategy for colorectal cancer.
**Correct Answer:** Not provided (missing options A, B, C, and D).