[Pancreatic epithelial tumors with double cellular components. Report of two cases with immunohistochemical study].

Histopathological studies of pancreatic tumors can show two different cellular components: exocrine and endocrine. Histological and immunohistochemical staining is used to confirm the diagnosis and to appreciate the probable presence of an endocrine secretion. The hypothetical common embryological origin of the different pancreatic components is strengthened by the coexistence of these two cellular types; experimental studies in animals seem to confirm this view.