the pancreatic and jejunal tumors showed all structural and secretory patterns of epithelial endocrine tumors , including expression of cytokeratin , neuroendocrine markers like neuron-specific enolase , chromogranins and synaptophysin , peptides like vip , phm , grh , pp , insulin , neurotensin , glucagon , somatostatin and enkephalin , secretory granules , small clear vesicles , peculiar osmiophilic bodies , and occasional formation of tubules or microacini with specialized luminal surfaces .
C0008586
chromogranins
C0886515
secretory granules