**Question:** Treatment of choice for ZES:

A. Surgery
B. Medical Management
C. Endoscopic Therapy
D. PPI Therapy

**Core Concept:**
ZES (Zollinger-Ellison Syndrome) is a rare disorder characterized by the excessive secretion of gastric acid due to the presence of gastrin-secreting tumors in the pancreas or duodenum. These tumors stimulate the parietal cells in the stomach, leading to achlorhydria and ulcer formation.

**Why the Correct Answer is Right:**
In the context of ZES, D2 receptor antagonists like omeprazole, lansoprazole, and pantoprazole are the first-line treatment options. These drugs inhibit the proton pump (H+/K+-ATPase) in the stomach, significantly reducing gastric acid secretion. This leads to healing of gastric ulcers and prevention of recurrence.

**Why Each Wrong Option is Incorrect:**
A. Surgery (gastrectomy or vagotomy) is considered when medical therapy fails, as it is a more invasive and permanent procedure, with higher risks and complications compared to medical management.

B. Medical Management (PPI therapy) is the primary treatment option for ZES, as mentioned above.

C. Endoscopic therapy (e.g., endoscopic mucosal resection or radiofrequency ablation) is a treatment option for gastric ulcers but is not a primary choice for ZES, as it does not address the underlying hormonal imbalance caused by gastrin-secreting tumors.

**Clinical Pearl:**
In treating Zollinger-Ellison Syndrome, a step-up approach is often employed. Initially, a proton pump inhibitor (PPI) is used to control symptoms and reduce gastric acid secretion. If the ulcers do not heal, then endoscopic therapy can be considered. If both medical and endoscopic therapy fail, surgical intervention may be considered, but this is typically the last resort due to the risks and complications involved.