Low power light micrograph of a gastric body biopsy from a patient with Zollinger-Ellison syndrome. The mucosa has an abnormally thick pit compartment and an expanded glandular compartment with much of the expansion due to an excess of parietal cells.
From: Lewin KJ, Appelman HD. Tumors of the esophagus and stomach. Atlas of tumor pathology (electronic fascicle), Third series, fascicle 18, 1996, Washington, DC. Armed Forces Institute of Pathology.