Which is true regarding site of Meckel’s diveiculum:
Meckel's diverticulum is a congenital anomaly, right? It's a remnant of the vitelline duct. The key points about its location are that it's found in the ileum, specifically on the antimesenteric border. The distance from the ileocecal valve is usually around 100 cm, but I think the exact number might be 100 cm. Also, the diverticulum is about 2-5 cm in length.
The question is about the site, so the correct answer would mention the ileum, antimesenteric side, and the distance. Let me check the options again. Since the user didn't provide the options, I'll assume standard distractors. Common wrong options might be the jejunum, mesenteric border, or incorrect distances like 50 cm or 150 cm.
In the Core Concept, I need to state that Meckel's is a true diverticulum from the vitelline duct, located in the ileum. The Why Correct section should explain the embryology, location, and distance. For the incorrect options, each wrong one should be addressed—like if an option says jejunum, explain that it's ileum. If an option says mesenteric border, clarify that it's the antimesenteric.
Clinical Pearls should highlight the 2% incidence, the rule of 2s (2% prevalence, 2 cm, 2 feet from cecum), and complications like bleeding or obstruction. Also, the importance of knowing the location for surgical considerations.
Wait, the user said the correct answer is provided as . So I need to make sure the correct answer is correctly identified in the explanation. Since the options aren't given, I'll proceed with the standard correct answer structure.
I should make sure the explanation is concise, within the character limit. Each section needs to be brief but informative. Avoid any markdown except bold for section titles and key terms. Also, ensure that all sections are present: Core Concept, Why Correct, Why Each Wrong Option is Incorrect, Clinical Pearl, and Correct Answer Line.
Let me structure the explanation step by step, making sure each part is accurate and adheres to the user's formatting rules. Check for any possible mistakes, like confusing ileum with jejunum or distances. Also, remember that Meckel's diverticulum can have ectopic tissue like gastric or pancreatic, which might be relevant in some questions, but since the question is about site, focus on that aspect. Alright, time to put it all together.
**Core Concept**
Meckel's diverticulum is a true congenital diverticulum of the ileum, arising from the persistence of the vitelline duct. It is located **50-100 cm proximal to the ileocecal valve**, on the **antimesenteric border** of the ileum, and is **2-5 cm in length**. It follows the embryological path of the vitelline duct connecting the yolk sac to the mid