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Living with Zollinger-Ellison syndrome

A condition where tumors in the pancreas or small intestine cause too much stomach acid, leading to ulcers and belly pain.

Understanding Zollinger-Ellison syndrome

Zollinger-Ellison syndrome is a condition in which tumors called gastrinomas cause the stomach to make too much acid.

The tumors, in the pancreas and duodenum (part of the small intestine), raise levels of the hormone gastrin. The extra acid can cause belly pain, ulcers, vomiting blood and diarrhea. The tumors are sometimes cancerous and can spread. GARD lists onset in adults and older adults.

Signs & symptoms

Symptoms vary from person to person. GARD lists these among the most common:

  • Belly pain that comes and goes
  • Ulcers in the stomach or duodenum
  • Diarrhea
  • Nausea
  • Inflamed esophagus (esophagitis)
  • Weight loss

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include cancer specialists, digestive system specialists and hormone specialists.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

Care & treatment

Care team
Cancer specialists (oncologists); Digestive system specialists (gastroenterologists); Hormone specialists (endocrinologists)
Expert care
Ask about multidisciplinary care centers for rare conditions
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with Association for Multiple Endocrine Neoplasia Disorders and other patient organizations
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
Could I have MEN1, and should I have genetic testing?
What tests can find the tumors?
How can the extra stomach acid and ulcers be managed?

Quick facts

Symptoms usually startAdult and as an Older Adult

In most cases, GARD says the cause is unknown. About 25 to 30 percent of gastrinomas are caused by an inherited condition called multiple endocrine neoplasia type 1 (MEN1).

EndocrineGastrointestinal

Also known as: excessive gastrin secretion; gastrinoma; pancreatic ulcerogenic tumor syndrome; z e syndrome; ze - zollinger-ellison syndrome; zes

Patient organizations

Source: NIH GARD · Zollinger-Ellison syndromeGARD ID 7918 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Zollinger-Ellison syndrome.

Explore the Zollinger-Ellison syndrome blog

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Explore actively recruiting Zollinger-Ellison syndrome studies with HealthSpark.

HealthSpark

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  • Recruiting studies from ClinicalTrials.gov
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  • Eligibility is confirmed by the study team

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Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

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