Figure 2.

a. Chromogranin A-positive cells (arrows) in the normal appendiceal glands (G) and in submucosa (S), b. Chromogranin A-positive endocrine cells (arrows) delineate the tumour nests of goblet cells, c. Somatostatin-positive endocrine cells (arrows) in the normal appendiceal mucosa, d. Somatostatin-positive cells (arrows) in the appendiceal submucosa (S), e. Synaptophysin-positive endocrine cells (arrow) in the normal appendiceal mucosa, f. Synaptophysin-positive endocrine cells (arrow) in the appendiceal submucosa (S). Magnifications × a, b, c, d, e, f- × 300.