General Information About Zollinger-Ellison Syndrome
Disease Details and Frequently Asked Questions
It is a clinical syndrome caused by tumors (Gastrinomas) forming in the pancreas or the first part of the small intestine (duodenum). These tumors pump extraordinary amounts of the hormone 'Gastrin' into the bloodstream, which uncontrollably commands the stomach to produce massive volumes of acid, essentially causing the digestive tract to digest itself.
Ordinary peptic ulcers present as singular lesions and heal readily with standard stomach-protecting acid suppressants (PPIs). In contrast, this syndrome is characterized by the presence of multiple, gigantic, recurrent ulcers scattered throughout the stomach and intestines that are highly prone to bleeding or perforating, and are remarkably resistant to conventional medical therapy.
Symptoms include severe, gnawing abdominal/epigastric pain that frequently awakens the patient from sleep, severe heartburn (GERD), hematemesis (vomiting blood), and notably, chronic, watery, and foul-smelling fatty diarrhea (steatorrhea) resulting from the acidic destruction of intestinal enzymes, which prevents nutrient absorption.
Yes, approximately 60% to 70% of these gastrinoma tumors are malignant. Although they typically grow slowly, they carry a significant risk of metastasizing (spreading) to the regional lymph nodes and the liver over time.
Clinical suspicion arises when upper endoscopy reveals multiple atypical or refractory ulcers. The primary diagnostic biochemical test is the measurement of a 'Fasting Serum Gastrin' level (which will be pathologically elevated). A Secretin stimulation test may be performed to confirm. Advanced imaging modalities such as Endoscopic Ultrasound (EUS), somatostatin receptor scintigraphy, or Gallium-68 DOTATATE PET-CT are utilized to precisely localize the occult tumor.
To suppress the lethal acid hypersecretion and salvage the gastrointestinal tract, patients are placed on lifelong, ultra-high doses of Proton Pump Inhibitors (PPIs)—often 3 to 4 times the standard ulcer dosage. If advanced imaging confirms that the tumor is localized and has not metastasized, it is meticulously removed via surgical excision, offering a potential 100% cure for the syndrome.
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