The immunohistochemical profile of the adenocarcinoma of upper gastric pole.

Although gastric adenocarcinoma continue to be the second continues to be the second cause of death worldwide, its incidence and mortality appear to have decreased in recent decades. Despite this decline, adenocarcinomas from proximal stomach tend to be more frequent during the last three decade. Adenocarcinomas with this location it seems that are a different, specific subtype of gastric carcinoma. The purpose of this study was to clarify the differences between gastric adenocarcinomas from upper and distal gastric pole using the immunohistochemistry. For this reason, we investigate histopathological and immunohistochemically 77 cases of upper gastric pole adenocarcinoma selected from a number of 472 gastric tumors. The immunohistochemistry was performing only in 32 cases by ABC technique with the following primary antibodies: Cytokeratin 7, Cytokeratin 19, Epithelial Membrane Antigen (EMA), Carcinoembryonic Antigen (CEA), Lysozyme, Vimentin, p53 protein, CD34 and Ki67 antigen. The acquired results do not distinguish a peculiar immunohistochemically profile unlike distal gastric adenocarcinomas. Nevertheless, we pointed out the predominance of diffuse adenocarcinomas type according to Laurens classification, which immunohistochemically were strong positive to cytokeratins, EMA, CEA and lysozyme. Moreover, investigation of some antigens likes lysozyme, p53, Ki67 and CD34 seems to be useful for prognostic estimation of carcinoma with this topography.