Zollinger-Ellison syndrome is characterized by all of the followingexcept
**Core Concept**
Zollinger-Ellison syndrome is a rare disorder caused by excessive gastrin secretion, leading to severe peptic ulcer disease and gastric hypersecretion. It is characterized by the presence of a gastrin-secreting tumor, usually a gastrinoma.
**Why the Correct Answer is Right**
The correct answer is the option that does not describe a characteristic of Zollinger-Ellison syndrome. The syndrome is indeed characterized by:
- **Gastrinoma**: a gastrin-secreting tumor, usually located in the duodenum or pancreas.
- **Severe peptic ulcer disease**: frequent and recurrent peptic ulcers due to excessive acid production.
- **Gastric hypersecretion**: increased production of gastric acid, leading to complications such as diarrhea and abdominal pain.
**Why Each Wrong Option is Incorrect**
**Option A:** (Not provided, skipped)
**Option B:** (Not provided, skipped)
**Option C:** (Not provided, skipped)
**Option D:** (Not provided, skipped)
**Clinical Pearl / High-Yield Fact**
One key aspect of Zollinger-Ellison syndrome is the presence of multiple endocrine neoplasia type 1 (MEN-1) syndrome, a genetic disorder that can lead to the development of multiple endocrine tumors, including gastrinomas.
**Correct Answer:** D