What is characterized by ulcers in the large intestines and rectum?

Ulcerative colitis is characterized by the presence of ulcers and inflammation specifically in the large intestines (colon) and rectum. It is a type of inflammatory bowel disease (IBD) that leads to chronic inflammation of the colon, resulting in symptoms such as abdominal pain, diarrhea, and rectal bleeding, often with mucus or pus due to the ulceration of the intestinal lining.

This condition primarily affects the innermost lining of the colon and rectum, leading to the formation of ulcers which can result in significant discomfort and a variety of complications if not managed properly. The visualization of these ulcers can often be confirmed through procedures like colonoscopy, where inflamed tissue can be observed directly.

In contrast, diverticulitis involves the formation and inflammation of pouches (diverticula) that can develop within the wall of the colon but does not specifically feature ulcers as a primary defining characteristic. IBS is a functional gastrointestinal disorder characterized primarily by chronic abdominal pain and altered bowel habits, without the presence of inflammation or ulcers. Appendicitis is inflammation of the appendix and does not involve the large intestine or rectum in a manner that leads to ulceration. Thus, the defining feature of ulcers located specifically in the large intestine and rectum aligns perfectly