Bleeding from alimentary tract in pseudo Zollinger-Ellison syndrome.

The report describes a case of a four-month-old infant, who developed acute gastric ulcer while being hospitalised because of pneumonia. One year's observation of the patient, additional tests, especially gastroscopy with histopathological evaluation of biopsy specimen, determination of gastrin level in blood serum, and therapy analysis allow to establish a diagnosis of pseudo Zollinger-Ellison syndrome.