Zollinger-Ellison syndrome is a condition that occurs with abnormal production of the hormone gastrin. A small tumor (gastrinoma) in the pancreas or small intestine produces the high levels of gastrin in the blood.
Zollinger-Ellison syndrome is caused by tumors, usually found in the head of the pancreas and the upper small bowel. These tumors produce the hormone gastrin and are called gastrinomas. High levels of gastrin cause too much production of stomach acid.
Gastrinomas occur as single tumors or as small, multiple tumors. About one-half to two-thirds of single gastrinomas are cancerous (malignant) tumors that commonly spread to the liver and nearby lymph nodes.
A number of patients with gastrinomas have many tumors as part of a condition called multiple endocrine neoplasia type I (MEN I). MEN I patients often have tumors of the pituitary gland (brain) and parathyroid gland (neck), as well as tumors of the pancreas.
Even with early diagnosis and surgery to remove the tumor, the cure rate is relatively low. However, gastrinomas grow slowly, and patients may live for many years after the tumor is discovered. Acid-suppressing medications are very effective at controlling the symptoms of too much acid production.
Call your health care provider if you have severe abdominal pain that does not go away, especially if it occurs with diarrhea.
- Failure to locate the tumor during surgery
- Intestinal bleeding or hole (perforation) from ulcers in the stomach or duodenum
- Severe diarrhea and weight loss
- Spread of the tumor to other organs (most often liver and lymph nodes)
Medications called proton pump inhibitors (omeprazole, lansoprazole) are now the first choice for treating Zollinger-Ellison syndrome. These drugs reduce acid production by the stomach, and promote healing of ulcers in the stomach and small bowel. They also relieve abdominal pain and diarrhea.
Surgery to remove a single gastrinoma may be done if there is no evidence that it has spread to other organs (such as lymph nodes or the liver). Surgery on the stomach (gastrectomy) to control acid production is rarely needed today.
Review Date: 2/20/2008
Reviewed By: Christian Stone, MD, Division of Gastroenterology, Washington University in St. Louis, School of Medicine, St. Louis, MO. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- 2009 A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.