Sporadic gastrinoma with refractory benign esophageal stricture: A case report

Figure 1 Diagnosis of gastrinoma. A: Plain and enhanced magnetic resonance imaging scans of the pancreas showed a mass approximately 2.6 cm × 3.2 cm in size located at the head of the pancreas (indicated by orange arrows); B: Hematoxylin-eosin staining (× 400) and immunohistochemical stains (× 400) of the mass: The tumor cells, arranged into solid nests, exhibited abundant cytoplasm, fine and granulated chromatin, and inconspicuous nucleoli (B-I); Tumor cells were positive for synaptophysin (B-II), neuron-specific enolase (B-III), and gastrin (B-IV).