**Core Concept**
Hutch diverticulum is a rare, congenital anomaly of the appendix, characterized by a diverticulum or outpouching of the appendix wall. This condition is often associated with an increased risk of appendicitis and appendiceal neoplasms.

**Why the Correct Answer is Right**
The Hutch diverticulum arises due to the abnormal development of the appendix during embryogenesis. It is thought to result from an imbalance between the growth of the mucosa and the muscular layer of the appendix, leading to a localized weakness in the wall. This can cause the formation of a diverticulum, which can become inflamed or obstructed, leading to appendicitis.

**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because Meckel's diverticulum is a different congenital anomaly of the small intestine, not the appendix.
**Option B:** Incorrect because a diverticulum of the sigmoid colon is a different condition, not related to the appendix or Hutch diverticulum.
**Option C:** Incorrect because an appendiceal stump blowout is a complication of appendectomy, not a congenital anomaly of the appendix.

**Clinical Pearl / High-Yield Fact**
Hutch diverticulum is a rare but important condition to recognize, as it can increase the risk of appendicitis and appendiceal neoplasms.

**Correct Answer:** D.