What is a key characteristic of sigmoidoscopy compared to colonoscopy?

What is a key characteristic of sigmoidoscopy compared to colonoscopy?

• A. it examines the entire colon
• B. it is less invasive
• C. it focuses on the colorectal junction
• D. it only assesses the rectum and sigmoid colon

Answer: (D)

The key characteristic of sigmoidoscopy is that it only assesses the rectum and sigmoid colon. This procedure is specifically designed to visualize the lower part of the colon, which includes the rectum and the sigmoid colon, making it particularly useful for detecting abnormalities or conditions in these areas, such as polyps or inflammation. In contrast, colonoscopy is a more comprehensive examination that allows the physician to view the entire colon from the rectum to the cecum. Since sigmoidoscopy has a more limited scope, it generally takes less time and may involve different preparation and sedation protocols compared to colonoscopy. Additionally, focusing on the rectum and sigmoid allows for targeted interventions or evaluations that are relevant to these specific sections of the gastrointestinal tract.

The key characteristic of sigmoidoscopy is that it only assesses the rectum and sigmoid colon. This procedure is specifically designed to visualize the lower part of the colon, which includes the rectum and the sigmoid colon, making it particularly useful for detecting abnormalities or conditions in these areas, such as polyps or inflammation.

In contrast, colonoscopy is a more comprehensive examination that allows the physician to view the entire colon from the rectum to the cecum. Since sigmoidoscopy has a more limited scope, it generally takes less time and may involve different preparation and sedation protocols compared to colonoscopy. Additionally, focusing on the rectum and sigmoid allows for targeted interventions or evaluations that are relevant to these specific sections of the gastrointestinal tract.