The simultaneous presence of primary lymphoma and adenocarcinoma in the stomach.

The authors describe a rare case, recently observed by them, of coexisting primary lymphoma and adenocarcinoma of the stomach. After illustrating the more salient aspects of the clinical and anatomopathological pattern, the Authors discuss the general issue of the simultaneous presence of the two pathologies, analysing in particular their classification and etiopathogenic aspects. They then discuss the peculiar aspects of the case considered, including the preoperative diagnosis of non-Hodgkin gastric lymphoma, and highlight the fact that, unlike what is more frequently reported in the literature, the carcinomatous component had been completely ignored. As a final consideration, they stress the importance of studying this rare combination of tumoral components in order to gain a better understanding of oncogenic mechanisms so far unknown.